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BoP Lab / Buttonwillow Raceway Park

B-Spec + STU at Buttonwillow Raceway Park

No mapCal Club 2024, Cal Club 2023

Track map: sectors and speed trap

Track map with timing sectors and speed trap
Shown for: Cal Club 2026 (practice, qualifying, race) · Cal Club 2025 (practice, qualifying, race)
Class · click a class to switch, + to compare alongside
Track configuration
Events

This track has been raced on 4 configurations (The Circuit, 2.57 mi; 19, 2.92 mi; 1.83 mi; 3.02 mi). Laps on different configurations are not comparable, so only events on the 2.57 mile layout are shown; switch above to see the others.

One session is left out because the timing does not look like full laps: Cal Club 2023 Qualifying #2.

One run is left out as not that car's own laps (far quicker than the car managed in any other session and than anyone else in its class all week; usually a swapped transponder): Thomas Lepper in Cal Club 2026 Grp 1 EP FP HP B-Spec Race 1 (1:42.146; the car's best in any other session was 2:12.311 and the rest of the class's best all week 2:09.353).

PosCarDriverClass#LapTheoreticalQualRace5-lap stintConsistencyTrapS1S2S3
1Mazda RX-3Tony RiveraSTU091:50.913 A-Q21:50.8701:50.913 A-Q21:52.737 A-R21:54.126 A-R2+2.638 A-R2135.2 A-Q230.415 A-Q232.456 A-Q247.999 A-Q2
2Mazda MiataWhitfield GreggSTU171:51.602 B-P1:51.6022:02.264 B-Q22:01.538 B-R12:02.222 B-R1+1.271 B-R1116.3 A-Q130.652 B-P32.263 B-P48.687 B-P
3BMW M3Wilson PowellSTU771:52.380 B-P1:52.1641:55.401 B-Q11:53.843 B-R11:54.699 B-R1+1.965 B-R1102.6 B-R130.577 B-P32.372 B-P49.215 B-P
4Honda S2000Rylan HazeltonSTU491:53.640 B-R11:53.1401:55.834 B-Q11:53.640 B-R11:54.534 A-R2+0.714 A-R2134.8 A-R230.582 B-R132.779 B-R149.779 A-R2
5BMW 330Sean LovettSTU371:56.492 A-Q21:56.4261:56.492 A-Q21:57.049 A-R21:57.605 A-R2+1.649 A-R2133.7 A-R231.816 A-Q233.669 A-Q150.941 A-Q2
6Nissan 300ZXJames SlechtaSTU751:59.183 A-Q21:59.1831:59.183 A-Q22:00.458 A-R22:01.009 A-R2+0.921 A-R2132.0 A-Q132.882 A-Q234.528 A-Q251.773 A-Q2
7Mazda MX-5Oscar JacksonSTU1611:59.707 B-R21:58.8881:59.707 B-R21:59.952 B-R2+1.112 B-R2103.9 B-R232.339 B-R234.219 B-R252.330 B-R2
8Mazda RX-7Michael LewisSTU322:00.248 A-R12:00.1792:00.248 A-R12:02.190 A-R2+1.431 A-R2130.4 A-R132.729 A-R134.570 A-R152.880 A-R1
9Mazda MX-5Dale ShoemakerSTU522:01.642 B-R22:01.1762:04.115 B-Q12:01.642 B-R22:02.793 B-R2+2.442 B-R2125.9 A-Q232.956 B-R234.983 B-R253.237 B-R2
10Mini CooperTrenton KramerB-Spec102:09.353 A-Q22:09.1392:09.353 A-Q22:09.916 A-R22:10.556 A-R2+1.494 A-R2121.5 A-R234.887 A-Q237.301 A-R256.951 A-Q2
11Mini CooperThomas LepperB-Spec212:10.054 B-R22:09.8952:10.736 B-Q12:10.054 B-R22:11.091 B-R2+1.353 B-R2117.3 A-R234.984 B-R237.433 B-Q157.478 B-R2
12Mazda 2Ali NaimiB-Spec142:10.149 B-R22:09.3332:11.287 B-Q22:10.149 B-R22:10.973 B-R2+1.174 B-R2117.2 A-Q1, A-R234.986 B-R237.336 B-R257.011 B-R2
13Toyota YarisJoseph GerschB-Spec382:10.513 B-Q22:09.9902:10.513 B-Q22:10.749 B-R22:11.238 B-R2+0.616 B-R2118.3 A-R235.332 B-Q237.456 B-Q257.202 B-R2
14Mazda 2Tim LinerudB-Spec952:12.574 A-R22:11.8712:15.496 A-Q22:12.574 A-R22:13.019 A-R2+0.902 A-R2113.0 A-R235.895 A-R237.881 A-R258.095 A-R2
15Mazda 2Wendy Epstein AnnisB-Spec1212:17.323 B-Q12:16.4932:17.323 B-Q12:17.406 B-R22:18.609 B-R2+2.962 B-R288.7 B-Q1, B-R236.448 B-Q139.291 B-Q11:00.754 B-Q1

One row per driver and car (a driver who changed cars has a row for each). Each cell is that driver's best in that car across the selected events, with the session it was set in. Best 5-lap stint is the mean of the driver's quickest five consecutive race laps, and consistency is how far their median race lap sat behind their best in that race (small is a driver who does it every lap); both come from the race with the best stint. The fastest in each column is purple, and a car whose best lap is more than 115% of the fastest in its class is greyed (marked ">115%" beside the driver) and left out of the colour scale. Click a column to sort, a row to highlight it. Theoretical lap is the sum of the best sectors, whichever laps they came from, and never slower than the best lap (where a car's fastest laps were recorded without sector times, its best lap is used). The 115% mark is about the car's best lap only: a car whose best lap is within 115% of the fastest in its class is never marked. Greyed sectors with no theoretical lap mean the sector times on file do not add up to a believable lap. Letters refer to the events above; Q is qualifying, R a race.

Sectors

Sectors are numbered in lap order from start/finish, whatever each event's timing called them; the loop names are SCCA timing's.

By car

CarClassDriversLapQualRaceTrapS1S2S3
Mazda RX-3STU11:50.913Tony Rivera1:50.913Tony Rivera1:52.737Tony Rivera135.2Tony Rivera30.415Tony Rivera32.456Tony Rivera47.999Tony Rivera
Mazda MiataSTU11:51.602Whitfield Gregg2:02.264Whitfield Gregg2:01.538Whitfield Gregg116.3Whitfield Gregg30.652Whitfield Gregg32.263Whitfield Gregg48.687Whitfield Gregg
BMW M3STU11:52.380Wilson Powell1:55.401Wilson Powell1:53.843Wilson Powell102.6Wilson Powell30.577Wilson Powell32.372Wilson Powell49.215Wilson Powell
Honda S2000STU11:53.640Rylan Hazelton1:55.834Rylan Hazelton1:53.640Rylan Hazelton134.8Rylan Hazelton30.582Rylan Hazelton32.779Rylan Hazelton49.779Rylan Hazelton
BMW 330STU11:56.492Sean Lovett1:56.492Sean Lovett1:57.049Sean Lovett133.7Sean Lovett31.816Sean Lovett33.669Sean Lovett50.941Sean Lovett
Nissan 300ZXSTU11:59.183James Slechta1:59.183James Slechta2:00.458James Slechta132.0James Slechta32.882James Slechta34.528James Slechta51.773James Slechta
Mazda MX-5STU21:59.707Oscar Jackson2:04.115Dale Shoemaker1:59.707Oscar Jackson125.9Dale Shoemaker32.339Oscar Jackson34.219Oscar Jackson52.330Oscar Jackson
Mazda RX-7STU12:00.248Michael Lewis2:00.248Michael Lewis130.4Michael Lewis32.729Michael Lewis34.570Michael Lewis52.880Michael Lewis
Mini CooperB-Spec22:09.353Trenton Kramer2:09.353Trenton Kramer2:09.916Trenton Kramer121.5Trenton Kramer34.887Trenton Kramer37.301Trenton Kramer56.951Trenton Kramer
Mazda 2B-Spec32:10.149Ali Naimi2:11.287Ali Naimi2:10.149Ali Naimi117.2Ali Naimi34.986Ali Naimi37.336Ali Naimi57.011Ali Naimi
Toyota YarisB-Spec12:10.513Joseph Gersch2:10.513Joseph Gersch2:10.749Joseph Gersch118.3Joseph Gersch35.332Joseph Gersch37.456Joseph Gersch57.202Joseph Gersch

The best any driver of each car managed across the selected events, with who set it. Spellings and model years of the same car are grouped; click a row marked ▸ to see each version. Grouping is worked out from the names, so tell us if two cars are wrongly merged or split.

Rule changes between these events

Cal Club 2023 → Cal Club 2024 2023-02-24 to 2024-02-23

B-Spec Early Model Mini

#33363 from John Phillips · Rule change · TB 23-03 (2023-03 Fastrack)

Summary

fasterB-Spec Mini Cooper R56 MT/AT and Clubman R55 fuel pressure regulator increased from 40mm to 41mm with OE catalyst.

As printed in Fastrack

In BSPEC Spec Lines, Mini Cooper (R56) MT (07-10), change Notes as follows:
“40 1mm FPR required with OE catalyst”
“OBX header part #10-2101-2S permitted with 40mm FPR.”
In BSPEC Spec Lines, Mini Cooper (R56) AT (07-10), change Notes as follows:
“40 1mm FPR required with OE catalyst”
“OBX header part #10-2101-2S permitted with 40mm FPR.”
In BSPEC Spec Lines, Mini Cooper Clubman (R55) (07 - 10), change Notes as follows:
“40 1mm FPR required with OE catalyst”

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“OBX header part #10-2101-2S permitted with 40mm FPR.”

STU E&O STU NA Weight Chart.

#33737 from Eric Heinrich · Rule change · TB 23-03 (2023-03 Fastrack)

Summary

fasterSTU minimum weight chart updated: 2450cc to 2595lbs, 2600cc to 2710lbs.

As printed in Fastrack

In STU, GCR Section 9.1.4.1.H.1. chart, Factory Engine Displacement (cc) Minimum Weight (lbs), change as follows:
"2450 2596 2595"
"2600 2860 2710"

B-Spec Helper Versus Tender springs.

#33866 from Frank Schwartz · Rule change · TB 23-03 (2023-03 Fastrack)

Summary

slowerB-Spec may use helper springs up to 500 pounds rate; tender springs now prohibited.

As printed in Fastrack

In B-Spec Category Specifications, GCR Section 9.1.10.E.36., change as follows:
"Suspension: competitors may use the OEM suspension, the specific suspension kit approved on the spec line or any B14 Bilstein
shock or strut with no modifications except as required for mounting or to achieve allowed camber. Any camber plate may be
used, but may not alter caster. Caster shall be within factory specification. Any part required to adapt the B14’s to the car must
be submitted for approval by the CRB and added to the individual spec line. Any spring, including ‘helper’ or ‘tender’ springs, up
to a maximum spring rate of 500 pounds may be used. Helper springs made of thin flat wire that are designed to take up the gap
between the main spring and shock/strut at full travel are allowed. Tender springs are not allowed. Spring are allowed to be
strapped or zip tied to the body. The purpose of the strap should be to keep the spring in place when the axle goes into rebound.

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The strap can serve no other function. Bump stops may be deleted but cannot be modified or substituted and shall serve no
other purpose. Adjustable sway bar end links may be used on all cars. Sway bars may be disconnected and removed."

STU Alternate OEM Miata Intake Manifold

#33827 from Brandon Steinhauer · Rule change · TB 23-04 (2023-04 Fastrack)

Summary

wordingSTU Mazda BP5A classified at 1839 cc maximum displacement, 2023-04-01.

As printed in Fastrack

In STU Spec lines, classify Mazda BP5A as follows:
STU Maximum Displacement (cc's) Minimum Weight Notes
Mazda BP5A 1839 Chart May use engine in its entirety or specific
components from the engine.

B-Spec T5 Rules Feedback

#33595 from Morgan Trotter · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

wordingB-Spec and C-Spec wording clarified: CATEGORY to CATEGORIES, rules priority clarified for tire sizes, rim widths, springs, anti-roll bars, performance equipment.

As printed in Fastrack

In B-Spec, GCR Section 9.1.10.B, add as follows:
“9.1.10. B-SPEC and C-SPEC CATEGORY CATEGORIES
B-Spec (B-Spec)
C-Spec (C-Spec)
9.1.10 continues in the B-SPEC and C-SPEC Category Rules.”
In B-Spec, GCR Section 9.1.10.B-SPEC Category, change as follows:
“These specifications are presented as an adjunct to the Manufacturer’s Service Manual. They are not meant to supersede the
information that is in the manual that legitimately applies to the make, model, and year of car with the exception of the

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following items: TIRE SIZES, RIM WIDTHS, SPRINGS, ANTI-ROLL BAR(S), and PERFORMANCE EQUIPMENT. In the case of the
foregoing exceptions, the B-Spec these Competition Rules will have priority.
These specifications reflect the best information available at the time of publication. Any error found in
this edition will be updated when reliable specifications are available from the manufacturer/manufacturer
distributor or other sources recognized by SCCA®, Inc.
A. Definition
The B-Spec and C-Spec CATEGORY categories shall be considered primarily as a form for the membership to race street stock
automobiles. Eligibility of cars may be discontinued at any time, for any reason other than competitive stature. The burden of
proof lies upon any participant seeking action against another participant.
NOTE: A Shop/Service Manual or its equivalent for the specific make, model, and year of automobile is required to be in the
possession of each entrant. Manufacturer Shop/Service Manuals may come in the form of printed material, microfiche, CD, DVD,
and/or Internet access to manufacturer website databases. It is the responsibility of the competitor to provide the electronic
device capable of accessing the data for compliance verification. If Manufacturer Shop/Service Manuals are not available, then
the competitor shall have a copy of the official SCCA® Vehicle Technical Sheet (VTS) with them at every event and shall present it
for reference when officially requested. The manual is intended to aid SCCA® Technical Scrutineers in identifying parts and the
configuration of the automobile. Overhaul procedures that in the slightest way would increase performance are not to be
utilized (e.g., milled heads/blocks, porting, etc.). Blueprinting and balancing are inconsistent with the philosophy of this class and
are not permitted.
B. Automobile Eligibility
Only those cars listed on spec lines are eligible to compete. Cars classified will be approved by EPA and DOT for sale in the
United States and by Environment Canada for sale in Canada. They shall be models available to the general public for purchase.
Additions and deletions of automobiles shall be at the discretion of the SCCA®. The vehicle identification number (VIN) shall
correspond with the model automobile classified. At least one VIN plate or stamping shall remain in place on the dashboard or
chassis that corresponds with the model automobile classified.
C. Classification
Classifications of automobiles eligible for competition will be reviewed on an annual basis and will be effective as of January 1st.
D. Technical and Safety Items
The following represent the only safety items and modifications permitted and required on automobiles involved in B Spec and
C-Spec competition. Cars must meet comply with the GCR. The addition of safety items not specifically listed is not permitted.
No permitted component/modification shall additionally perform a prohibited function.
1. Roll cages shall be contained entirely within the driver/passenger compartment and must comply with GCR Section 9.4, Roll
Cages for GT and Production Based Cars.
2. Installation of a fire extinguisher or fire system as specified in GCR Section 9.3, Fire System.
3. Installation of a safety harness system as specified in GCR Section 9.3, Driver’s Restraint System.
4. All cars shall run with both front door windows fully open (down) if equipped, and shall have a driver’s side window safety net
per GCR Section 9.3, Window Safety Nets. Any cars where a window safety net cannot be installed, arm restraints shall be used.
Arm restraints are not an acceptable substitute for window nets in other cars. Window safety nets shall be mounted in such a
manner to provide protection in the event the driver’s door opens. Rear windows shall be run in the closed (up) position.
5. Passive restraint systems shall be deactivated.*
6. Air bag systems shall be disarmed and may be removed.* If so equipped, the rolling door lock mechanism may be deactivated
by unplugging the components.
7. The driver’s seat (only) shall be replaced with a one-piece, bucket-type race seat. Standard seat tracks/brackets may be
modified, reinforced, and/or removed to facilitate replacement mountings provided they perform no other function.
8. Steering lock mechanisms may be removed or disabled.
9. An electrical master switch may be installed.
*If car is used on public roads, these items should be replaced, reactivated, rearmed, etc. when not in
competition.
E. Vehicle Preparation
The following represents the only items authorized in the preparation of a vehicle for B-Spec and C-Spec competition other than
safety items as required in Section 9.1.7.D, Technical and Safety Items. Modifications shall not be made unless specifically
authorized herein. No permitted component/modification shall additionally perform a prohibited function.
1. Appearance shall be neat and clean. Automobiles that are dirty either externally or in the engine or passenger compartments,
or that show bodywork damage or that are partially or totally in primer, or that do not bear the prescribed identification marks
shall not be approved for competition. Vehicles may be painted any color(s).
2. Towing eyes per GCR Section 9.3, Towing Eyes, shall be fitted.
3. Hubcaps, wheel trim rings, jack, and tools shall be removed.
4. All mud flaps shall be removed.
5. Spare wheels and tires may be removed. Spare tire covers and trunk mats and/or trunk carpeting shall be removed if they
present a hazard as a loose flying or flapping object.
6. All adjustments shall be at the manufacturer’s specification and/or within the manufacturer’s specified tolerances unless they
are specifically allowed in the GCR (example camber angle).
7. Tires:
a. Tires shall be Hankook 205/50R15 C51 or Hankook 200/580R15 Z217. No mixing of wet and dry tires on the same car. Tires
must be run unmodified.
b. When using the wet tire, all cars get a 0.2” lower ride height allowance due to smaller radius of the wet tire.
8. Wheels: Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum
Wheel/rim weight shall be 13 lbs. All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must
be the same dimensional offset. Aftermarket wheel studs and/or wheel bolts are allowed. Wheel bolts may be replaced with
studs and nuts. Wheel spacers are allowed, the same thickness spacer must be used on all four corners.
Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude
beyond the fender opening when viewed from the top perpendicular to the ground.
9. Radio/stereo audio equipment and air conditioning refrigerant systems are the only options permitted and may be non-
manufacturer, standard equipment. Two way radios may be used. Hand controls are allowed in those instances where the driver
can demonstrate the physical need for them. Removal of rear window wipers and wiper motor is allowed.
10. Fuel, coolant, oil fluid hoses and clamps, oil filters, fuel filters, and belts (fan, alternator, etc.) may be substituted with others
of equivalent manufacturer’s specifications.
11. Brake fluid: May be substituted with other equivalent manufacturer’s specification.
12. Lubricants: Lubricants may be substituted with any lubricant. Additives are unrestricted.
13. Spark Plugs: Authorized spark plugs listed in spark plug manufacturer’s application charts, owner’s manual, manufacturer’s
shop/service manual, or equivalent justified by one cross reference chart. Use of resistor- or non resistor spark plug allowed.
14. “Special performance” specifications from the manufacturer that go beyond those listed on a specification line for a car will
not be considered valid.
Any manufacturer determined to be supplying false specifications to competitors or to SCCA will be advised that the
specifications shall be withdrawn and/or the eligibility of the car(s) involved will be terminated. The SCCA® Club Racing Board
(CRB) is authorized to implement these terminations on an immediate basis without Board of Directors (BoD) approval. In the
case of service circulars, recalls, etc., the burden of proof of validity will be upon the competitor.
15. Ride height: Minimum ride height is six (6) inches, to be measured without driver at the lowest point of the rocker panels,
but not to include welded seams or fasteners. A vehicle may have a ride height listed in the spec line, the competitor must
conform to the spec line.
16. Batteries may be replaced with those of alternate manufacture provided they are of similar amp hour (Ah) capacity and
weight. Battery must remain in stock location. Additional hold-down brackets are allowed.
17. Weight: The minimum weight as listed on the B Spec and C-Spec line is with driver and ballast may be added to meet the
listed minimum weight. Refer to section 9.3. Ballast, for placement of the ballast. If a cool suit system is utilized, the cool suit
system shall be weighed with the car as it came off the track.
A. The ballast shall be in segments no lighter than ten (10) pounds and no heavier than fifty (50) pounds.
B. Each segment shall be fastened with a minimum of two (2) one-half inch (1/2”) bolts and positive lock nuts of SAE Grade
5/Metric 8.8 or better, and shall utilize large diameter, load distributing washers.
18. Fuel: Only the fuel type specified by the owner’s or manufacturer’s shop/service manual may be used. Refer to GCR Section
9.3, Fuel, for permitted fuel specifications.
19. Removal of Air Conditioning System: The manufacturer’s or aftermarket air conditioning system may be removed. Items that
serve a dual purpose, such as the alternator/air conditioning compressor bracket, may not be substituted. Idler pulleys and belts
may be substituted as needed when compressor is removed.
20. Removal of radio and speaker components is permitted. Removal of horn and cruise control system is permitted.
21. A radiator screen of minimum one-fourth inch (1/4”) mesh may be added in front of the radiator and contained within the
bodywork.
22. Air filter elements may be substituted with other air filters of equivalent specifications and fit in the standard location with
no modifications. The filter element must be substantiated by a minimum of one (1) manufacturer cross-reference for specific
vehicle application.
23. Any brake pad or lining may be used. Metal or plastic dust shields may be removed or modified by removing material.
24. Standard replacement brake rotors/drums may be obtained from sources other than the original manufacturer provided
they are the exact equivalent.
25. The Club Racing Board may approve the use of automatic transmissions and/or hand controls on a case-by-case basis.
26. Interior mirror(s) may be replaced with a multi-panel type mirror, but shall not extend beyond the confines of the interior.
27. Only OE catalyst are permitted. The exhaust system downstream of the primary catalyst may be replaced provided:
A. Said replacement system retains the same original configuration, e.g., routing, single, dual, etc.
B. The system exits from the body in the same approximate location(s) as the original. When an original equipment single
exhaust system is cosmetically split into dual outlets, it is permitted to continue as a single system provided it exits in
approximately the same location as one of the originals.
C. The system meets all appropriate event-specific sound level requirements.
D. All oxygen sensors must be intact and in stock location.
E. Primary catalytic converter may not be modified in any way.
F . The Mazda 2, Fiat 500, 2007-10 Mini Cooper all may remove the primary cat/exhaust manifold to install their approved
header. All oxygen sensors must be maintained. The original heat shields or heat wrap may be used to insulate the replacement
header from objects they come close to.
28. Aftermarket steering wheels, and their required mounting modifications, are permitted. Removable steering wheels are
permitted.
29. Lap Timing and Data Acquisition Devices that perform no function other than to relay lap times to the driver (Longacre Hot
Lap, Intercomp Lap Timer, etc.) are permitted, along with the required mounting hardware and connections. Stand-alone data
acquisition systems (GPS or accelerometer-based) are allowed. One connection from the OBD2 port to the stand-alone data
acquisition system is permitted. No additional sensors may be added and the data acquisition system must not tie into the
vehicle electronics in any other manner beyond this allowance. The SCCA may install a standalone data box in a competitor’s car
at any time. Refusal of the installation of the data box will result in disqualification.
Analog (needle type) gauges for oil pressure, oil temp and water temp may be added as long as they are not tied into the
vehicles ECU in any way. Stand alone shift lights may be added.
30. Sunroofs, Targa tops, and T-tops are only permitted if installed by the manufacturer of the vehicle. If installed they must be
retained in the closed position and securely bolted in place unless the operating rails adequately secure the panel. Glass panels
are permitted. Glass panels may be replaced with a ferrous metal panel. Components (motors, cables, rails) may be removed
provided the panel is securely retained.
31. Hatchback “privacy covers” must be completely removed.
32. Cosmetic plastic engine covers may be removed.
33. Original brake and clutch hoses may be replaced by braided stainless steel brake lines and clutch lines.
34. Interiors may be removed including seats, seat brackets, carpet, carpet padding, rear door panels, OEM seat belts, interior
trim, and headliners. Front door window glass, front window operating mechanism, inner door trim panel, armrest, map
pockets, wiring harnesses for front door locks, power mirrors, seat wiring, etc., and inside front door latch/lock operating
mechanism may be removed. Original radio/ stereo audio equipment and air conditioner refrigerant systems may be removed.
Heater cores, and hoses, must remain except duct work under seats. Duct work behind the dash may be trimmed but not
removed to allow for roll cage installation.
35. Maximum 3.5 degrees negative camber is allowed on front and rear suspensions. Strut suspensions may adjust camber by
the use of eccentric bolts (crash bolts) at the strut-to-spindle, slotted strut mounting holes at the spindle, and/or by use of any
slotted camber only adjuster plate at the top of the strut mounting plate. If upper strut slotted plates are used, they shall be
located on existing chassis structure and may not serve as reinforcement for that structure. Modifications to the top of the strut
tower may be made to allow for camber adjustment only. Modifications to the existing holes must only be moved straight
inboard even if the existing slots would translate the top of the strut rearward. On other forms of suspension, camber
adjustment may be achieved by the use of shims and/or eccentric bolts (crash bolts).
36. Suspension: competitors may use the OEM suspension, the specific suspension kit approved on the spec line or any B14
Bilstein shock or strut with no modifications except as required for mounting or to achieve allowed camber. Any camber plate
may be used, but may not alter caster. Caster shall be within factory specification. Any part required to adapt the B14’s to the
car must be submitted for approval by the CRB and added to the individual spec line. Any spring, including ‘helper’ or ‘tender’
springs, up to a maximum spring rate of 500 pounds may be used. Helper springs made of thin flat wire that are designed to take
up the gap between the main spring and shock/strut at full travel are allowed. Tender springs are not allowed. Springs are
allowed to be strapped or zip tied to the body. The purpose of the strap should be to keep the spring in place when the axle goes
into rebound. The strap can serve no other function. Bump stops may be deleted but cannot be modified or substituted and
shall serve no other purpose. Adjustable sway bar end links may be used on all cars. Sway bars may be disconnected and
removed.
If a manufacture does not offer an upgrade, a competitor may submit a shock and spring package for approval by the CRB. At the
time of approval, that kit will become the standard for that make and model until the manufacture submits a factory supported
kit.
The competitor supplied kits needs to be comprised of the following:
• Any non-adjustable shock absorber intended for the specific make model and year car is allowed. The shock absorber must be
installed in the original mounting locations. Remote shocks are not permitted. Threaded shock bodies or adjusters may be used.
• Any spring up to a maximum spring rate of 500 pounds may be used with the OEM suspension, the
manufacturer’s upgraded suspension kit, or the Bilstein B14 suspension kit.
37. ECU/PCM: OEM ECU/PCMs is required. Alternate engine calibrations are allowed. The car may meet federal emission
standards, but shall provide OBD II compliant data to the data link connector. Manufacturers may provide a stability control
override procedure or module.
38. B Spec and C-Spec front and rear toe settings are free. Rear toe adjustments may be achieved by the use of shims.
39. Fenders and wheel openings shall remain unmodified. It is permitted to roll under or flatten any interior lip on the wheel
opening for tire clearance. Cars with plastic/composite fenders may remove any interior wheel opening lip, but the resulting
material edge shall be no thinner than the basic fender material thickness. Non metallic inner fender liners may be removed.
40. An oil catch can is permitted.
41. Optional Hood Pins may be added to supplement the original hood latch system. All parts of the original hood latch system
must remain in the car.
42. Brake ducts are permitted, but they must serve no other purpose. Duct openings may be created by the removal of the fog
lights. Alternatively, duct openings may be created by opening 2 sections up to 14.5 square inches each of stock false grills
originally located in the front fascia, or radiator shroud, but in this case while fog lamps may be removed. Fog light holes must
be completely covered. The stock headlamp location is not permitted for brake ducting.
43. Automatic and cvt transmissions versions of all legal cars are legal for competition in B-Spec and C-Spec meeting their spec
line. Models with OEM paddle shifters are acceptable. Auxiliary transmission coolers may be approved on a case by case basis.
Part numbers must be submitted and added to the cars spec line.
44. Auxiliary transmission coolers may be approved on a case by case basis. Part numbers must be submitted and added to the
cars spec line.
45. Restrictor – BS B-Spec and C-Spec cars whose spec line require a restrictor will follow the definition of a Flat Plate Restrictor
(FPR) outlined in Appendix F with only one exception, B-Spec and C-Spec requires the thickness of the Restrictor to be 0.050” to
0.079.
46. All B-Spec and C-Spec cars in post-race impound at all Majors and Super Tour races shall open their hoods and
hatches/trunks for the purpose of visual inspection by other competitors. Competitors may thereafter initiate a protest as
permitted under the GCR.”
In GCR, CONTENTS, change as follows:
“9.1.9.2 TOURING (T2-T5 4) CATEGORY”
“T5 697”
In GCR, Section 9.1.9. TOURING CATEGORY CLASSES, remove as follows:
“Touring 5 (T5) Regional Class”
In GCR, Section 9.3.22. FIRE SYSTEM, change as follows:
“All cars shall be equipped with an On-Board Fire System except T3, T4, T5,”
In GCR, Section 9.1.9.2 TOURING (T2-T5) CATEGORY header, change as follows:
“TOURING (T2-T5 4) CATEGORY”
In GCR, Section 9.1.9.2 TOURING (T2-T5) CATEGORY, change as follows:
“Touring car eligibility: Cars are eligible for the class they are listed with a specification line and with the specific allowances
permitted. In addition T2-T5 4 cars may race one class up in touring classes above their specification line class as long as they are
a legal T2-T5 4 car and conform to their specification line allowances as classified. T5 is a Regional only class.”
In GCR, Section 9.1.9.2.D.1.e.1., change as follows:
“Any overbore up to .020” permitted T2- T5 4with +30 lbs. penalty. Oversize OEM equivalent pistons are required. This allowance
does not apply to any car adhering to spec rules.”
In GCR, Section 9.1.9.2.D.1.i.5., change as follows:
“T2- T5 4 only:”
In GCR, Section 9.1.9.2.D.5.a.1., change as follows:
“T2- T5 4:”
“Spherical bearings/bushings are not permitted in T2- T5 4 except for the specific examples listed in the class rules or vehicle
spec line.”
In GCR, Section 9.1.9.2.D.5.b.2., change as follows:
“T4 and T5 only”
In GCR, Section 9.1.9.2.D.5.b.2.c., change as follows:
“T3, T4 and T5 4:”
In GCR, Section 9.1.9.2.D.5.b.2.d., change as follows:
“T2- T5 4 only:”
In GCR, Section 9.1.9.2.D.7.a.3., remove as follows:
“T5 only: (unless specified on spec line) Any aftermarket wheel allowed.”
In GCR, Section 9.1.9.2.D.7.b., remove as follows:
“ T5 has a maximum tire width of 225 and a minimum aspect ratio of 45.”
In GCR, Section 9.1.9.2.D.10.c., remove as follows:
“All cars shall have, as a minimum, a fire extinguisher meeting the specifications of GCR Section 9.3 Fire System. Touring 2 cars
must have a fire system installed. Touring 3,and Touring 4, and Touring 5”
In GCR, Section 9.1.9.2.E.1., remove as follows:
“Touring Category Classes are as follows: T2, T3, T4 and T5 4:”
In GCR, Touring Spec Lines, remove 9.1.9.2. T5 Spec Line in it’s entirety.

B-Spec T5 Mazda 3 Spec Line Addition

#33536 from Morgan Trotter · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

cars addedC-Spec Mazda 3i Touring 2.0 Skyactive MT (12-13) newly classified with 155 hp, 148 lb-ft torque, 2900 lbs.

As printed in Fastrack

In C-Spec Spec Lines, classify Mazda 3i Touring 2.0 Skyactive MT (12-13) as follows:

A specification table follows in the original; it is not shown here.

B-Spec T5 Ride Height Rules.

#33552 from Michael Ogren · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

suspension & brakesB-Spec minimum ride height set to 6 inches, C-Spec to 5½ inches.

As printed in Fastrack

In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.15., add the following:
"Ride height: For B-Spec Minimum ride height is six (6) inches, for C-Spec Minimum ride height is five and a half (5½) inches,"

B-Spec T5 Spring Allowance

#33557 from Mike Ogren · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

suspension & brakesB-Spec springs capped at 500# front and rear; C-Spec at 600# front, 800# rear; both may be strapped to body.

As printed in Fastrack

In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.36., add the following:
"Suspension: B-SPEC competitors may use the OEM suspension, the specific suspension kit approved on the spec line or any B14
Bilstein shock or strut with no modifications except as required for mounting or to achieve allowed camber. C-Spec competitors
may use the OEM Suspension, the specific suspension kit approved on the spec line or TBD. Any camber plate may be used, but
may not alter caster. Caster shall be within factory specification. Any part required to adapt the B14’s to the car must be
submitted for approval by the CRB and added to the individual spec line. Any spring, including ‘helper’ or ‘tender’ springs, up to
a maximum spring rate of 500 pounds may be used. for B-Spec the maximum spring rate is 500# front and rear, for C-Spec the
maximum spring rate is 600 pounds front and 800 pounds rear. Spring are allowed to be strapped or zip tied to the body. The

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purpose of the strap should be to keep the spring in place when the axle goes into rebound. The strap can serve no other
function. Bump stops may be deleted but cannot be modified or substituted and shall serve no other purpose. Adjustable sway
bar end links may be used on all cars. Sway bars may be disconnected and removed.

B-Spec T5 Wheel Minimum Weight

#33558 from Mike Ogren · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

tyres & wheelsB-Spec wheels minimum weight set to 13 lbs, C-Spec to 17 lbs.

As printed in Fastrack

In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.8., add the following:
"Wheels: For B-Spec Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”).
Minimum Wheel/rim weight shall be 13 lbs. For C-Spec Required wheel/rim diameter is seventeen inches (17”). Maximum
wheel/rim width is eight inches (8”). Minimum Wheel/rim weight shall be 17 lbs.."

B-Spec T5 Tire Options

#33641 from Frank Schwartz · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

tyres & wheelsB-Spec adds Hankook 200/580R15 Z217 tire option alongside 205/50R15 C51; C-Spec specifies 225/45R17.

As printed in Fastrack

In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.7.a., add the following:
"For B-Spec: Tires shall be Hankook 205/50R15 C51 or Hankook 200/580R15 Z217. No mixing of wet and dry
tires on the same car. For C-Spec: Tires shall be 225/45R17. DOT Tires must be run unmodified.

B-Spec Allow ZZP Sonic Aluminum Radiator 1.68

#33660 from Brandon Vivian · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

fasterB-Spec and C-Spec Chevrolet Sonic allows ZZP aluminum radiator #ZZP-ZZ013; Hatch MT restrictor increases to 34mm.

As printed in Fastrack

In B-Spec Spec Lines, Chevrolet Sonic 4dr Sedan MT (12-19), add to Notes as follows:
"Allow Aluminum Radiator #ZZP-ZZ013."
In B-Spec Spec Lines, Chevrolet Sonic 4dr Sedan AT (12-19), change as follows:
Car: "Chevrolet Sonic 4dr SedanHatch AT (12-19)"
Notes:"Allow Aluminum Radiator #ZZP-ZZ013."
In B-Spec Spec Lines, Chevrolet Sonic 4dr Hatch MT (12-19) , add to Notes as follows:
"6T40e automatic equipped only. 33 34mm flat plate restrictor required. GM suspension kit #23123679 permitted. Allow rear
sway bar ZZ Performance #ZZ-SNCRSB. Allow Aluminum Radiator #ZZP-ZZ013."

B-Spec Fasteners for Bumper Caps

#33797 from Kent Carter · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

wordingB-Spec and C-Spec bumper caps now allow positive fasteners like machine screws and T-nuts or rivet-nuts; self-drilling and sheet metal screws prohibited.

As printed in Fastrack

In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E., add the following:
"47. Positive fasteners may be used to attach the bumper caps to the OEM bumper cap clips and may include a machine screw
and T-nut or a rivet-nut. Pointed screws such as self-drilling/tapping or sheet metal screws are prohibited."

B-Spec Allow CAN Bus Connection to Data Systems

#33806 from Kent Carter · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

wordingB-Spec and C-Spec allow CAN bus connections to data systems for monitoring only; systems must not send data.

As printed in Fastrack

In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E.29., change as follows:
"Lap Timing and Data Acquisition Devices that perform no function other than to relay lap times to the driver (Longacre Hot Lap,
Intercomp Lap Timer, etc.) are permitted, along with the required mounting hardware and connections. Stand-alone data
acquisition systems (GPS or accelerometer-based) are allowed. One connection from the OBD2 port to the stand-alone data
acquisition system is permitted. No additional sensors may be added and the data acquisition system must not tie into the
vehicle electronics in any other manner beyond this allowance. The SCCA may install a standalone data box in a
competitor’s car at any time. Refusal of the installation of the data box will result in disqualification. Analog (needle type) gauges
for oil pressure, oil temp and water temp may be added as long as they are not tied into the vehicles ECU in any way. Stand

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alone shift lights may be added.
Connections to the CAN bus are permitted for the purpose of reading CAN data to monitor vehicle and driver performance using
data logging systems, dashboards and indicators. All connected systems must remain 'silent' on the CAN bus: they may receive
data but must not send data on the BUS. GPS-based data acquisition and coaching devices are permitted."

B-Spec Request Ford Fiesta weight reduction 25lbs

#33890 from Andrew Doyle · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

fasterB-Spec Ford Fiesta 5dr and 4dr lose 25 lbs each, to 2470 lbs minimum weight.

As printed in Fastrack

In B-Spec Spec Lines, Ford Fiesta 5dr Hatchback (11-19), change Weight as follows:
"2495 2470"
In B-Spec Spec Lines, Ford Fiesta 4dr Sedan (11-19), change Weight as follows:
"2495 2470"

B-Spec Threaded Metal Inserts for Plastic Intake Manifolds

#34164 from Kent Carter · Rule change · TB 23-06 (2023-06 Fastrack)

Summary

wordingB-Spec and C-Spec allow metal threaded inserts in plastic intake manifolds for throttle body fasteners.

As printed in Fastrack

In B-Spec and C-Spec Categories Specifications, GCR Section 9.1.10.E., add the following:
"48. All cars which use throttle body to intake fasteners directly into a plastic intake, are allowed to convert the intakes to
accommodate a metal threaded insert. This is done for the sole reason that repeated removal of the restrictor plate wears the
threads in the intake and eventually causes the need to replace the intake."

B-Spec BoB Adjustments

#34208 from Club Racing Board · Rule change · TB 23-05 (2023-05 Fastrack)

Summary

unclearB-Spec Ford Fiesta 5dr and 4dr lose 25 lbs each to 2470; Honda Fit MT and CVT lose 50 lbs each to 2525; Mazda2 loses 50 lbs to 2280; Kia Rio restrictor increases from 39 to 41 mm; Mini Cooper variants gain 75 lbs to 2675 with larger restri…

As printed in Fastrack

The popularity of BSPEC has brought heightened attention to the Balance of Performance (BoP). Given the wide diversity of
eligible cars and their designs, driving ability, car preparation/tuning levels, and other variables outside of SCCA’s control, the BoP
in this class has been remarkably close. As compared to IMSA’s job of balancing cars which are all professionally prepared, driven,
and highly instrumented, the job of our advisory committees and CRB is considerably more difficult. There are most certainly
outliers and cars which are superior under certain conditions, but in the absence of BoP regulations which vary from track to track
a perfect balance every weekend is not to be expected. The BoP is set by SCCA for what is perceived to be the ultimate tune and
best driver in a given car across the entire racing season and over as many tracks as can be reasonably sampled. If a car is not
prepared, tuned, and driven to its ultimate capability we cannot expect that it will be on par with cars of other manufacture which

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are to such level; the BoP is not a handicap program. And, while the class is named “BSPEC”, it is not a spec class as is FE2 or SRF3.
The more experienced mechanics and drivers will certainly have an advantage over those who only race a few times per season.
Anecdotal observations do not serve the SCCA in working towards a proper BoP, yet that is the type of information most commonly
provided in support of a requested change. Hard data and experience are what drive change to the BoP.
Despite what we believe to be an excellent BoP for this class, there is always room for improvement. The BSPEC Advisory
Committee has recently been charged with the considerable task of classifying cars and refining the technical specifications for
the new T5/CSPEC class and, as a result, does not have sufficient time or resources to address the immediate demands for BoP
adjustments in BSPEC. As a result, veteran CRB members Peter Keane, Tom Start, and Sam Henry have poured through BSPEC
data reports from events over the past eighteen (18) months and have recommended to the CRB the following changes which
were approved during its most recent meeting. These changes will be effective beginning 5/1/2023 for positive adjustments and
6/1/2023 for negative adjustments. Data will be gathered as possible with a focus on continued improvement. Comments and
suggestions regarding same should be forwarded through the official letter system. Your continuing support of BSPEC and SCCA
is greatly appreciated.
In B-SPEC Spec Lines, Ford Fiesta 5dr Hatchback (11-19), change Weight as follows:
“2495 2470”
In B-SPEC Spec Lines, Ford Fiesta 4dr Sedan (11-19), change Weight as follows:
“2495 2470”
In B-SPEC Spec Lines, Honda Fit MT (15-19), change Weight as follows:
“2575 2525”
In B-SPEC Spec Lines, Honda Fit CVT (15-19), change Weight as follows:
“2575 2525”
In B-SPEC Spec Lines, Kia Rio 5-door/LX (12-19), change Notes as follows:
“39 41mm flat plate restrictor required.”
In B-SPEC Spec Lines, Mazda2 (10-14), change Weight as follows:
“2330 2280”
In B-SPEC Spec Lines, Mini Cooper (R56) MT (07-10), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 41 44mm FPR required with OE catalyst.”
In B-SPEC Spec Lines, Mini Cooper (R56) AT (07-10), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 41 44mm FPR required with OE catalyst.”
In B-SPEC Spec Lines, Mini Cooper Clubman (R55) (07 - 10), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 41 44mm FPR required with OE catalyst.”
In B-SPEC Spec Lines, Mini Cooper (R56LCI) MT (11-13), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 41 43mm FPR required.”
In B-SPEC Spec Lines, Mini Cooper (R56LCI) AT (11-13), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 40 43mm FPR required.”
In B-SPEC Spec Lines, Mini Cooper Countryman (R60) (11-16), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 41 42mm flat plate restrictor required.”
In B-SPEC Spec Lines, Mini Cooper Paceman (R61) (11-16), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 41 42mm flat plate restrictor required.”
In B-SPEC Spec Lines, Mini Cooper Clubman (R55) (11-15), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 41 42mm flat plate restrictor required.”
In B-SPEC Spec Lines, Mini Cooper Coupe (R58) (12-15), change as follows:
Weight: “(Effective 6/1/2023) 2600 2675”
Notes: “(Effective 6/1/2023) 40 42mm flat plate restrictor required.”

B-Spec Hyundai Accent Restrictor Plate

#34331 from Jose Fabian · Rule change · TB 23-06 (2023-07 Fastrack)

Summary

fasterB-Spec Hyundai Accent GS Hatchback restrictor plate increases from 39mm to 41mm.

As printed in Fastrack

In B-Spec Spec Lines, Hyundai Accent GS Hatchback (13-19), change Notes as follows:
"39 41mm"

B-Spec Hyundai Accent 2012 Model

#34332 from Jose Fabian · Rule change · TB 23-06 (2023-07 Fastrack)

Summary

wordingB-Spec Hyundai Accent GS Hatchback model years corrected from 13–19 to 12–19.

As printed in Fastrack

In B-Spec Spec Lines, Hyundai Accent GS Hatchback (13-19), change model as follows:
"Hyundai Accent GS Hatchback (13 12 -19)"

STU 2022 Toyota GR Cup for STU

#34449 from Club Racing Board · Rule change · TB 23-06 (2023-05 Fastrack)

Summary

cars addedToyota GR Cup and GR86 Cup (2022-) newly classified in STU at 2700 lbs with 2387 cc engine.

As printed in Fastrack

In STU Spec Lines, Toyota GR Cup (2022-), classify as follows:

A specification table follows in the original; it is not shown here.

B-Spec Initial car classifications and spec lines

#34461 from Kent Carter · Rule change · TB 23-09 (2023-09 Fastrack)

Summary

cars addedC-Spec adds Chevrolet Cruze, Ford Focus, Honda Civic, Mazda 3i, Toyota Corolla, VW Jetta; updates Dodge Dart, Mazda3s, Toyota Corolla specs.

As printed in Fastrack

In C-Spec Spec Lines, add Chevrolet Cruze (10-16) as follows:

A specification table follows in the original; it is not shown here.

B-Spec B-Spec Tire

#35034 from Club Racing Board · Rule change · TB 23-11 (2023-11 Fastrack)

Summary

tyres & wheelsB-Spec adds Goodyear Eagle RS dry and wet tires as options alongside Hankook; Hankook restricted to regional events from 2024.

As printed in Fastrack

RM 23-11 In GCR Section 9.1.10.7., change as follows:
"For the remainder of 2023, B-Spec entrants will be allowed to compete on both Hankook and Goodyear Tires. For B-Spec Tires
shall be Hankook 205/50R15 C51, or Hankook 200/580R15 Z217, P205/50ZR15 Goodyear Eagle RS (Dry tire) Catalog #D4850 or
P205/50ZR15 Goodyear Eagle RS-R (Wet tire) Catalog #D4851. For C-Spec: Tires shall be 225/45R17. No mixing of wet and dry
tires on the same car. Tires must be run unmodified. Effective 1-1-2024 Hankook Tires will be allowed at regional events only,
through 6-30-2024."

B-Spec Mazda 3i 2010-2013 5-Speed Manual Gear Ratios

#34820 from Dean Fehribach · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

unclearC-Spec Mazda 3i 10-13 third gear ratio corrected from 3.84 to 1.84.

As printed in Fastrack

In C-Spec Spec Lines, Mazda 3i (10-13), change Gear Rations as follows:
"3.3, 3.84?? 1.84,
1.31, 0.97,
0.75”

B-Spec Error Correction

#34955 from Frank Schwartz · Rule change · TB 23-12 (2023-12 Fastrack)

Summary

wordingC-Spec Dodge Dart 14-16 bore x stroke corrected to 88.0 x 82.0 mm, displacement to 1998 cc.

As printed in Fastrack

In C-Spec Spec Lines, Dodge Dart (14-16), change as follows:
Year: "(1413-16)"
Bore x Stroke(mm)/ Displ. (cc): "88.0 x 97.0 82.0
2360 1998"

B-Spec B-Spec Hankook Tire for Regionals

#35055 from SCCA Staff · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

tyres & wheelsB-Spec allows Hankook tires at regionals only through 6-30-2024; Goodyear only from 7-1-2024 for all events.

As printed in Fastrack

In GCR, Section 9.1.10.E.7., change as follows:
"a. For the remainder of 2023, B-Spec entrants will be allowed to compete on both Hankook and Goodyear Tires. For B-Spec
Tires shall be Hankook 205/50R15 C51, Hankook 200/580R15 Z217, P205/50ZR15 Goodyear Eagle RS (Dry tire) Catalog #D4850
or P205/50ZR15 Goodyear Eagle RS-R (Wet tire) Catalog #D4851. Effective 1-1-2024 Hankook Tires will be allowed at regional
events only, through 6-30-2024. Effective 7-1-2024 Goodyear is the only legal specified tire allowed in B-spec for all events.
For C-Spec: Tires shall be 225/45R17. No mixing of wet and dry tires on the same car. Tires must be run unmodified. Effective 1-
1-2024 Hankook Tires will be allowed at regional events only, through 6-30-2024.
b. When using the Hankook wet tire, all cars get a 0.2” lower ride height allowance due to smaller radius of the wet tire."

B-Spec Update 12-19 Nissan Versa Spec Line & Adjust BOP

#35074 from Matt Wolfe · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

fasterB-Spec Nissan Versa Note Hatchback (2013) minimum weight drops 60 lbs to 2490.

As printed in Fastrack

In B-Spec Spec Lines, Nissan Versa (2012), change Model as follows:
"Nissan Versa Sedan (2012-2019)"
In B-Spec Spec Lines, Nissan Versa Note (2013), change as follows:
Model: "Nissan Versa Note Hatchback (2013-2019)"
Min Weight: "2550 2490"
In B-Spec Spec Lines, Nissan Versa (2013-), delete Spec Line in its entirety.

B-Spec Clarifying the ECU and Data Acquisition language

#35236 from Kent Carter · Rule change · TB 24-01 (2024-01 Fastrack)

Summary

wordingB-Spec and C-Spec ECU and data acquisition rules clarified: ECU must be unaltered OE, no device capable of altering ECU characteristics permitted; data acquisition expanded to allow tachometer, air-fuel ratio, cylinder head temperature sen…

As printed in Fastrack

In GCR, Section 9.1.10.E.37., change as follows:
"ECU/PCM: OEM ECU/PCMs is required. Alternate engine calibrations are allowed. The car may meet federal emission
standards, but shall provide OBD II compliant data to the data link connector. Manufacturers may provide a stability control
override procedure or module. ECU/PCM: All electronic control systems (ECU/PCM/ABS, etc) must be unaltered, model-
appropriate US domestic market OE devices unless otherwise permitted on the spec line. Alternate engine calibrations are
allowed but no changes are permitted and no device capable of altering ECU characteristics may be present in the car from the
time the car enters the grid until after impound and any stewards’ actions. OBD II compliant data correct for the car must be
present at the data link connector. Malfunction codes (‘check engine light’) may be present. Manufacturers or competitors may

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submit ABS, stability control and speed limiter override procedures or modules for approval and listing on the spec line."
In GCR, Section 9.1.10.E.29., change as follows:
"Lap Timing and Data Acquisition Devices that perform no function other than to relay lap times to the driver (Longacre Hot Lap,
Intercomp Lap Timer, etc.) are permitted, along with the required mounting hardware and connections. Stand-alone data
acquisition systems (GPS or accelerometer-based) are allowed. The SCCA may install a standalone data box in a competitor’s car
at any time. Refusal of the installation of the data box will result in disqualification. Analog (needle type) gauges for oil pressure,
oil temp and water temp may be added as long as they are not tied into the vehicles ECU in any way. Stand alone shift lights may
be added. Connections to the CAN bus are permitted for the purpose of reading CAN data to monitor vehicle and driver
performance using data logging systems, dashboards and indicators. All connected systems must remain ‘silent’ on the CAN bus:
they may receive data but must not send data on the BUS. GPS-based data acquisition and coaching devices are permitted. Data
acquisition systems (GPS or accelerometer-based), lap timers, and coaching systems are allowed. Tachometer, shift lights, oil
pressure and temperature, coolant pressure and temperature, air-fuel ratio, and cylinder head temperature sensors may be
added, integrated into a data acquisition system, and/or displayed to the driver from entry into the grid until the end of impound
and stewards’ actions connections to the CAN bus are permitted only for the purpose of reading CAN data to monitor and display
vehicle and driver performance using data acquisition systems, dashboards and indicators. All connected systems must remain
‘silent’ on the CAN bus: they may receive data but must not be capable of sending or altering data on the bus, nor may they be
capable of changing ECU behavior. Collected data may be displayed to the driver. Devices must be securely mounted. External
devices may not be connected to the car during impound without the permission of a steward or tech official."

STU ST Electric-Assisted Steering Systems

#35066 from Jose Osiris Pena · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

wordingSTL and STU power steering rules clarified to permit electric-assisted and hydraulic-assisted steering systems.

As printed in Fastrack

In GCR, Section 9.1.4.M.16., change as follows:
"Power steering may be modified in any of the following ways:
a. disconnected , pump, belt, pulley, and hoses may be removed. Hoses may also be looped. Steering rack or box may be
modified internally to work without pump.
b. an OEM manual steering rack for that model may be fitted
c. an electric power steering pump may be fitted
d. an OEM electric-assisted steering system may be used or any column mounted electric steering assist may be used
e. an OEM hydraulic-assisted steering system may be used"

B-Spec Split Spec Line of Automatic and Manual 2nd Gen (09-14) Fit

#35251 from Matt Wolfe · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

wordingB-Spec Honda Fit MT (09-14) and AT now split into separate spec lines with distinct allowances.

As printed in Fastrack

In B-Spec Spec Lines, classify Honda Fit AT (09-14):
"09-14 Honda Fit AT"
Gear Ratios: "2.99, 1.68, 1.07, 0.76, 0.55"
Final Drive: "4.56"
Notes: Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100,
Damper RR 52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00
front helper spring and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed.
Allow rear sway bar Progress # 62.1061. Allow Setrab 50-119-7612 transmission cooler in addition to OEM. Any

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aftermarket exhaust/header allowed. (Effective date 1/1/24) Any Cold Air Intake Package allowed (any manufacturer)
with a 25lb adder.
In B-Spec Spec Lines, Honda Fit MT (09-14) make changes as follows:
Or 2.99, 1.68, 1.07, 0.76, 0.55 in automatic
Or 4.56 in automatic
"Alternate transmission ratio’s and final drive are for automatic equipped cars only and allow Setrab 50-119-7612
transmission cooler in addition to OEM. Any aftermarket exhaust/header allowed for the Automatic Transmission Honda
Fit."

B-Spec Equalize Mazda 2 Headers and clean up spec line

#35259 from Matt Wolfe · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

slowerB-Spec Mazda 2 10-14 weight increases 70 lbs to 2350, cat-delete headers now permitted.

As printed in Fastrack

In B-Spec Spec Lines, Mazda2 (10-14), change as follows:
Weight: "Effective 3-1-2024: 2280 2350"
Notes: "Helper springs F&R 0000-04-9926, Spring spacer F&R 0000-04-9925, Front sway bar end links adjstbl 0000-04-
2202, Rear sway bar 0000-04-2203-RR or 0000-04-2312, Modified strut bearing plate 0000-04-2204, Crash bolt set 0000-
04-2205, Allow rear torque bar Corksport #Mz2-3-070. Cold air intake Corksport Mz2-6-117-31100 and air duct Mz2-6-
120-10 are allowed. Effective 3-1-2024: Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001, or Mazda
Motorsports PN 0000-06-2410 permitted. Powerflex PFR19-1511BX2 rear suspension bushings allowed. Allow Mazda
part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C-56- 110A, DO8C-56-311, DO7A-56-

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321."

B-Spec Rear Sway Bar Request for Nissan Versa and Versa Note 2013-

#35323 from Richard Osborne · Rule change · TB 24-02 (2024-02 Fastrack)

Summary

suspension & brakesB-Spec Nissan Versa and Versa Note 2013-2019 now permit Hardrace HR-Q0146 19mm rear sway bar.

As printed in Fastrack

In B-Spec Spec Lines, Nissan Versa (2013-), change as follows:
Model: "Nissan Versa (2013-2019)"
Notes: "Hardrace HR-Q0146 19mm rear sway bar permitted."
In B-Spec Spec Lines, Nissan Versa Note (2013-), change as follows:
Model: "Nissan Versa Note (2013-2019)"
Notes: "Hardrace HR-Q0146 19mm rear sway bar permitted."

B-Spec Eliminate Redundant Trans Cooler Rule

#35353 from Matt Wolfe · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

wordingB-Spec and C-Spec eliminate case-by-case auxiliary transmission cooler approval requirement.

As printed in Fastrack

In GCR, Section 9.1.10.E.44., eliminate and renumber accordingly:
"44. Auxiliary transmission coolers may be approved on a case by case basis. Part numbers must be submitted and
added to the cars spec line."

B-Spec Fix Sonic Hatchback MT Spec Line

#35371 from Jonathan Wickert · Rule change · TB 24-02 (2024-01 Fastrack)

Summary

wordingB-Spec Chevrolet Sonic 5dr Hatch MT allows aluminum radiator #ZZP-ZZ013.

As printed in Fastrack

In B-Spec Spec Line, Chevrolet Sonic 5dr Hatch MT (12-19), add to Notes the following:
"Allow Aluminum Radiator #ZZP-ZZ013."

Cal Club 2024 → Cal Club 2025 2024-02-23 to 2025-02-22

B-Spec BOP Adjustment for Yaris iA, 2020+ Versa, and 07-08 Honda Fit

#35382 from Matt Wolfe · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

fasterB-Spec Honda Fit 07-08 loses 125 lbs to 2400; Versa S 2020+ loses 150 lbs to 2550; Yaris iA 16-20 loses 250 lbs to 2450.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit (07-08), change as follows:
Min weight: "2525 2400"
Notes: "Any Cold Air Intake Package allowed (any manufacturer). This configuration is not currently eligible for Runoffs
competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In
addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Honda Fit (07-08) Automatic, change as follows:
Min weight: "2525 2400"
Add to Notes: "Any Cold Air Intake Package allowed (any manufacturer). This configuration is not currently eligible for Runoffs

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competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In
addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Nissan Versa S (2020-), change as follows:
Min weight: "2700 2550"
Add to Notes: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate
Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM
or similar device must be submitted."
In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change as follows:
Min weight: 2700 2450"
Add to Notes: "This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate
Super Tour weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM
or similar device must be submitted."

STU Letter #35397 addendum

#35453 from Aaron Fitzsimmons · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

wordingSTU Mini Cooper S SC: alternate LEAP OMICRON hood scoop LEP-OMICRON3 permitted.

As printed in Fastrack

In STU Spec Lines, Mini Cooper S SC with Minimum Weight 1900 and 2100, add to Notes:
"Alternate LEAP OMICRON hood scoop part # LEP-OMICRON3 is permitted."

STU S54 Drysump

#35464 from Macey Urso · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

wordingSTU BMW S54 B32 OEM now permits dry sump oiling system.

As printed in Fastrack

In STU Spec Lines, BMW S54 B32 OEM, add to Notes as follows:
"Dry Sump oiling system permitted."

B-Spec 07-08 Honda Fit Rear Sway Bar part #

#35473 from B-Spec/C-Spec Committee · Rule change · TB 24-03 (2024-03 Fastrack)

Summary

wordingB-Spec Honda Fit 07-08 rear sway bar part number changed to Progress #62.1060.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit (07-08) Automatic, change Notes as follows:
"Allow rear sway bar Progress # 62.1061 0."
In B-Spec Spec Lines, Honda Fit (07-08), add to Notes the following:
"Allow rear sway bar Progress # 62.1060."

B-Spec Change restrictor from 30mm to 31mm (2015+ Honda Fit) and add 50#

#34857 from Matt Downing · Rule change · TB 24-04 (2024-04 Fastrack)

Summary

fasterB-Spec Honda Fit MT 2015-19 restrictor increases 30mm to 31mm, weight rises 2525 to 2550 lbs.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit MT (15-19), change as follows:
Weight: ""2525 2550"
Notes: "30 31mm"
In B-Spec Spec Lines, Honda Fit MT (15-19), change as follows:
Weight: ""2525 2550"
Notes: "30 31mm"

B-Spec Wheel Offset and Spacer Revision

#35466 from Kent Carter · Rule change · TB 24-04 (2024-04 Fastrack)

Summary

fasterB-Spec and C-Spec now permit wheels of any offset if tire doesn't protrude beyond fender; spacers allowed with differing left-right offsets per axle.

As printed in Fastrack

In GCR, Section 9.1.10.E.8., change as follows:
"Wheels: All wheels shall be one-piece metal castings or metal two piece welded. Wheels of any offset are permitted provided
the tire tread (the portion of the tire that contacts the ground) does not protrude beyond the fender opening when viewed from
the top perpendicular to the ground. Wheel spacers and aftermarket wheel studs/bolts are permitted. Wheel bolts may be
replaced with studs and nuts. Total offset must be the same left to right for an individual axle but may differ from front to rear.
For B-Spec Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum
Wheel/rim weight shall be 13 lbs.
For C-Spec Required wheel/ rim diameter is seventeen inches (17”). Maximum wheel/rim width is eight inches (8”). Minimum

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Wheel/rim weight shall be 17 lbs. All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must
be the same dimensional offset. Aftermarket wheel studs and/or wheel bolts are allowed. Wheel bolts may be replaced with
studs and nuts. Wheel spacers are allowed, the same thickness spacer must be used on all four corners. "

B-Spec Set Expiration Date for Unused Spec Lines

#35742 from B-Spec/C-Spec Committee · Rule change · TB 24-04 (2024-04 Fastrack)

Summary

wordingB-Spec Mini Cooper Countryman R60, Paceman R61, and Nissan Versa 1797cc spec lines expire 1/1/2025 unless appealed by 12/1/2024.

As printed in Fastrack

In B-Spec Spec Lines, Mini Cooper Countryman (R60) (11-16), add to Notes the following:
”**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.**”
In B-Spec Spec Lines, Mini Cooper Paceman (R61) (11-16), add to Notes the following:
”**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.** ”
In B-Spec Spec Lines, Nissan Versa (07-11) with 1797cc engine, add to Notes the following:
”**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.** ”

Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper

B-Spec Delete trim levels/update language for spec lines

#35746 from B-Spec/C-Spec Committee · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingB-Spec model descriptions standardized: trim levels and door count designations removed or replaced with body style wording.

As printed in Fastrack

In B-Spec Spec Lines, change Model description as follows:
"Chevrolet Sonic 4dr Sedan MT (12-19)"
"Chevrolet Sonic 4dr Sedan AT (12-19)"
"Chevrolet Sonic 5dr Hatch Hatchback MT (12-19)"
"Chevrolet Sonic 5dr Hatch Hatchback AT (12-19)"
"Ford Fiesta 5dr Hatchback (11-19)"
"Ford Fiesta 4dr Sedan (11-19)"
"Honda Fit MT (07-08)"

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"Honda Fit Automatic AT (07-08)"
"Honda Fit MT (09-14)"
"Hyundai Accent GS Hatchback (12-19)"
"Kia Rio 5-door/LX Hatchback (12-19)"
"Nissan Versa S (2020-)"
"Toyota Yaris Hatchback (07-11)"
"Toyota Yaris Hatchback (12-18)"

B-Spec Wheel Rules

#36066 from B-Spec/C-Spec Committee · Rule change · TB 24-05 (2024-05 Fastrack)

Summary

wordingB-Spec and C-Spec wheels must be same thickness spacers all four corners; wording clarified on offset and protrusion rules.

As printed in Fastrack

In GCR, Section 9.1.10.E.8., change as follows:
"Wheels: All wheels shall be one-piece metal castings or metal two piece welded. All four wheels must be the same dimensional
offset. Any offset is permitted so long as Wheels of any offset are permitted provided the tire tread (the that portion of the tire
that contacts the ground) does may not protrude beyond the fender opening when viewed from the top perpendicular to the
ground. Wheel spacers and aA ftermarket wheel studs/ and or wheel bolts are permitted allowed. Wheel bolts may be replaced
with studs and nuts. Wheel spacers are allowed, but must be the same thickness on all four corners.Total offset must be the
same left to right for an individual axle but may differ from front to rear.
B-Spec Required wheel/rim diameter is fifteen inches (15”). Maximum wheel/rim width is seven inches (7”). Minimum

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Wheel/rim weight shall be 13 lbs.
C-Spec Required wheel/rim diameter is seventeen inches (17”). Maximum wheel/rim width is eight inches (8”). Minimum
Wheel/rim weight shall be 17 lbs.
Wheels are permitted any offset provided the tire tread (that portion of the tire that contacts the ground) does not protrude
beyond the fender opening when viewed from the top perpendicular to the ground."

B-Spec Add B14 Kit Part # to Sonic Spec line In

#35969 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

wordingB-Spec and C-Spec Chevrolet Sonic Bilstein B14 kit #47-171725 verified compatible, suspension wording clarified.

As printed in Fastrack

B-Spec Spec Lines, change Notes follows:
Chevrolet Sonic Sedan MT (12-19): "33mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein B14 kit
#47-171725 verified compatible."
Chevrolet Sonic Sedan AT (12-19): "33mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein B14 kit
#47-171725 verified compatible."
Chevrolet Sonic Hatchback MT (12-19): "34mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein
B14 kit #47-171725 verified compatible."
Chevrolet Sonic Hatchback AT (12-19): "34mm flat plate restrictor required. GM suspension kit #2312 → 3679 permitted. Bilstein

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B14 kit #47-171725 verified compatible."

B-Spec Eliminate redundant sway bar end link part #s from notes In

#35970 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

wordingB-Spec Mazda2 and multiple Mini Cooper models eliminate redundant sway bar end link part number notes.

As printed in Fastrack

B-SPEC Spec Lines, elimination from Notes the following:
Mazda2 (10-14): "Front sway bar end links adjstbl 0000-04-2202,"
Mini Cooper Hatchback (R50) MT (02 - 06): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable
sway bar links part number 35 50 6 772 is allowed."
Mini Cooper Hatchback (R50) CVT (02 - 06): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable
sway bar links part number 35 50 6 772 is allowed."
Mini Cooper (R56) MT (07-10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."

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Mini Cooper (R56) AT (07-10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."
Mini Cooper Clubman (R55) (07 - 10): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway
bar links part number 35 50 6 772 is allowed."
Mini Cooper (R56LCI) MT (11-13): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."
Mini Cooper (R56LCI) AT (11-13): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."
Mini Cooper Countryman (R60) (11-16): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable
sway bar links part number 35 50 6 772 is allowed."
Mini Cooper Paceman (R61) (11-16): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway
bar links part number 35 50 6 772 is allowed."
Mini Cooper Clubman (R55) (11-15): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway
bar links part number 35 50 6 772 is allowed."
Mini Cooper Coupe (R58) (12-15): "Front adjustable sway bar links part number 31 35 6 771 is allowed. Rear adjustable sway bar
links part number 35 50 6 772 is allowed."

B-Spec Update Fiat 500 Spec line In

#35990 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

wordingB-Spec Fiat 500 spec line changes from model year 2012–15 to 2012–17.

As printed in Fastrack

B-SPEC Spec Lines, Fiat 500 (12-15), change year as follows: "Fiat 500 (12-
15 7)"

B-Spec Update (15-19) Honda Fit

#36067 from B-Spec/C-Spec Committee · Rule change · TB 24-06 (2024-06 Fastrack)

Summary

slowerB-Spec Honda Fit 15-19 CVT weight increases to 2550 lbs, restrictor to 31mm.

As printed in Fastrack

CVT Spec Line In B-SPEC Spec Lines, Honda Fit CVT (15-19), change as
follows:
Weight: "2525 2550"
Notes: "30 31mm"

B-Spec Clean up (15-19) Honda Fit MT & CVT Notes Sections

#36068 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

wordingB-Spec Honda Fit MT & CVT 15-19: cleaned up allowed parts notes, CVT gains Setrab transmission cooler option.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit MT (15-19), change notes as follows:
"31mm flat plate restrictor required. Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81,
Damper RR 52610F23SA80, Spring adjust assy RR 52691F23SA80, Bushing Comp, Damper RR TBD, Camber
Adjuster Comp, Damper 51920F23SA82, Damper wrench kit 89211F23SA80, Hose Set, FR & RR Brake
01464F23SA810, Pad Set, XR2 D948 54022F27SA81, Disk, FR Brake 45250F23SA80, Air cleaner element assy
17220FC4YA80, Exhaust pipe assy 18300F23SA81, ACG belt (6PK858) 31110FC4YA80. Allow rear sway bar
Progress 62.1063."
In B-Spec Spec Lines, Honda Fit CVT (15-19), change notes as follows:

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"31mm flat plate restrictor required. Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81,
Damper RR 52610F23SA80, Spring adjust assy RR 52691F23SA80, Bushing Comp, Damper RR TBD, Camber
Adjuster Comp, Damper 51920F23SA82, Damper wrench kit 89211F23SA80, Hose Set, FR & RR Brake
01464F23SA810, Pad Set, XR2 D948 54022F27SA81, Disk, FR Brake 45250F23SA80, Air cleaner element assy
17220FC4YA80, Exhaust pipe assy 18300F23SA81, ACG belt (6PK858) 31110FC4YA80. Allow rear sway bar
Progress 62.1063. CVT cars only Allow Setrab 50-119-7612 transmission cooler in addition to OEM."

B-Spec Set expiration date for Nissan Versa (09-11)

#36069 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

wordingB-Spec Nissan Versa (09-11) spec line expires 1/1/2025 unless appeal filed by 12/1/2024.

As printed in Fastrack

In B-Spec Spec Lines, Nissan Versa (09-11), add to notes the following:
"**This Spec line will expire 1/1/2025 unless an appeal is filed on or before 12/1/2024.**"

B-Spec Delete Redundant Rule 25

#36075 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

wordingB-Spec deletes redundant rule 25 in GCR Section 9.1.10.E.

As printed in Fastrack

In B-Spec, GCR Section 9.1.10.E.25., remove in its entirety and renumber.

B-Spec Correct error for rear brakes of Hyundai/Kia

#36174 from B-Spec/C-Spec Committee · Rule change · TB 24-07 (2024-07 Fastrack)

Summary

wordingB-Spec Hyundai Accent rear brakes corrected to 10.3 disc; Kia Rio rear brakes corrected to 10.3 disc.

As printed in Fastrack

In B-Spec Spec Lines, Hyundai Accent Hatchback (12-19), change brakes as follows:
"(R) 9.9 drum or 10.3 drum disc"
In B-Spec Spec Lines, Kia Rio Hatchback (12-19), change brakes as follows:
"(R) 10.3 drum disc"

B-Spec Update Tire Rules

#35984 from B-Spec/C-Spec Committee · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

tyres & wheelsB-Spec and C-Spec restricted to Goodyear Eagle RS/RS-R P205/50R15 and 225/45R17 tires respectively; Hankook tires removed; wet/dry mixing prohibited.

As printed in Fastrack

In GCR Section 9.1.10.E.7. change as follows:
"a. For the remainder of 2023, B-Spec entrants will be allowed to compete on both Hankook and Goodyear Tires. For B-
Spec: tires shall be Hankook 205/50R15 C51, Hankook 200/580R15 Z217, P205/50Z R15 Goodyear Eagle RS (Dry tire) Catalog
#D4850 or P205/50ZR15 Goodyear Eagle RS-R (Wet tire) Catalog #D4851. Effective 1-1-2024 Hankook Tires will be allowed at
regional events only, through 6-30-2024. Effective 7-1-2024 Goodyear is the only legal specified tire allowed in B-spec for all
events. Mixing wet and dry tires is not permitted. Tires may not be modified. All B-Spec competitors are required to place two (2)
12-inch or larger “Goodyear” decals on their cars, one on each side of the car above the front tire.
C-Spec: Tires shall be 225/45R17. No Mixing of wet and dry tires on the same car is not permitted. Tires must be run unmodified.

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b. When using the Hankook wet tire, all cars get a 0.2” lower ride height allowance due to smaller radius of the wet tire."

B-Spec BOP help for the automatic B-Specs

#36161 from B-Spec/C-Spec Committee · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

fasterB-Spec Sonic restrictors increased to 5-6mm, Fit weight cut 50-25 lbs, Mini Cooper weight reduced 45 lbs, various restrictor adjustments.

As printed in Fastrack

In B-Spec Spec Lines, change as follows:
Chevrolet Sonic Sedan AT
Notes: "33 5mm"
Chevrolet Sonic Hatchback AT
Notes: "34 6mm"
Honda Fit AT (07-08)
Weight (lbs): "2400 2350"
Notes: "Any aftermarket header allowed."

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Honda Fit AT (09-14)
Weight: "2525 2500"
Notes: "Any Cold Air Intake Package allowed (any manufacturer) with a 25lb adder."
Honda Fit CVT (15-19)
Notes: "31 3mm"
Mini Cooper Hatchback (R50) CVT (02-06)
Weight (lbs): "2545 2500"
Mini Cooper (R56) AT (07-10)
Notes: "44 6mm (OE Catalyst) or 40 2mm (Header)"
Mini Cooper (R56LCI) AT (11-13)
Notes: "43 5mm (OE Catalyst) or 41mm (Header)"

B-Spec Require hood pins

#36233 from Frank Schwartz · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

wordingB-Spec and C-Spec hood pins change from optional to recommended; factory release cable may be removed if pins used.

As printed in Fastrack

In GCR, Section 9.1.10.E.41., change as follows:
"Optional Hood Pins may be added to supplement the original hood latch system. All parts of the original hood latch system
must remain in the car. Installation of hood pins is recommended but not required. If hood pins are used, the factory release and
cable must be removed, but the secondary latch may be retained. Vehicles equipped with plastic release cables may replace them
with steel units. The OEM hood release latch may be relocated."

B-Spec Sonic Caliper Pistons

#36238 from Jonathan Wickert · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

wordingB-Spec and C-Spec Chevrolet Sonic and Cruze allow Babyface Fabrication brake caliper pistons.

As printed in Fastrack

In B-Spec Spec Lines, change Chevrolet Sonic Sedan MT (12-19), add to Notes the following:
"Allow Babyface Fabrication brake caliper piston SNC-SS."
In B-Spec Spec Lines, change Chevrolet Sonic Sedan AT (12-19), add to Notes the following:
"Allow Babyface Fabrication brake caliper piston SNC-SS."
In B-Spec Spec Lines, change Chevrolet Sonic Hatchback MT (12-19), add to Notes the following:
"Allow Babyface Fabrication brake caliper piston SNC-SS."
In B-Spec Spec Lines, change Chevrolet Sonic Hatchback AT (12-19), add to Notes the following:
"Allow Babyface Fabrication brake caliper piston SNC-SS."

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In C-Spec Spec Lines, change Chevrolet Cruze (2010-16), add to Notes the following:
"Allow Babyface Fabrication brake caliper piston CRZ-SS."

STU RWD Turbo Disadvantage

#36255 from David Fiorelli · Rule change · TB 24-08 (2024-08 Fastrack)

Summary

fasterSTU RWD turbo cars no longer required to reduce restrictor by 1 mm from table.

As printed in Fastrack

In GCR, Section 9.1.4.1.H.3 - Inlet Restrictor (mm) Minimum Weight (lbs) table, change as follows:
"RWD cars must reduce restrictor 1 mm from this table"

B-Spec Scion IA/Toyota Yaris/Mazda 2 DY chassis suspension

#35780 from Derrick Ambrose · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

unclearB-Spec Toyota/Scion IA Sedan 16-20 allows ST Suspension Kit 13275022, requires three Super Tour weekends and OBD-II data submission.

As printed in Fastrack

In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change Notes as follows:
"38mm FPR. (Effective 11/1/2024) Allow ST Suspension Kit 13275022. This configuration is not currently eligible for Runoffs
competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In
addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted."

B-Spec Clean up 07-08 Honda Fit AT Notes Section

#36542 from B-Spec/C-Spec Committee · Rule change · TB 24-09 (2024-09 Fastrack)

Summary

fasterHonda Fit AT 07-08 B-Spec and C-Spec: rear sway bar Progress #62.1060 and any cold air intake package now allowed.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit AT 07-08, change Notes as follows:
"(Effective 11/1/2024) Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH
51606F23SA100, Damper RR 52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200,
51402FC4YA00 front helper spring and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is
allowed. Allow rear sway bar Progress # 62.1060. Any Cold Air Intake Package allowed (any manufacturer). This configuration is
not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that
performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be
submitted."

STU R53 15% Pulley Request

#36980 from Aaron Fitzsimmons · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

slowerSTU Mini Cooper S SC 1900 restricts to 2.565 diameter pulley; 2100 allows 2.285 diameter pulley.

As printed in Fastrack

In STU Spec Lines, Mini Cooper S SC, add to notes:
1900: "Stock supercharger pulley. 2.565 diameter."
2100: "JCW Pulley permitted. May run a 2.285 diameter pulley."

STU Request to Remove Miata Hubs from General category

#37138 from Christopher Childs · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

wordingSTL/STU: 90-05 Mazda Miata alternate front wheel hubs moved from General to specific part approval.

As printed in Fastrack

In GCR, Section 9.1.4.M.18., change as follows:
"18. Allow alternate front wheel front hubs, Mazda Motorsports Development Part #0000-04-5HUB-S1, for the 90-05 Mazda
Miata: Mazda Motorsports Development Part #0000-04-5HUB-S1."

STU BMW N54/N55 Engine Allowance

#37146 from Martin Sarukhanyan · Rule change · TB 24-12 (2024-12 Fastrack)

Summary

slowerSTU BMW N54/N55 turbo inlet restrictors now required per GCR definition; turbo swapping prohibited.

As printed in Fastrack

"Turbo inlet restrictors designed per GCR Appendix F Technical Glossary definition of “Turbo Inlet Restrictor” may be required;
see table 9.1.4.1.H.h.2 3. Swapping of turbochargers between engine makes and models is prohibited. Supercharged cars may be
approved on a case-by-case basis; twin turbo engines are allowed on a case-by-case basis only. Contact the Road Racing
Technical Office for details. Twin turbo engines may be converted to single turbo using one of the allowed alternate turbos (see
9.1.4.1.H.3 2). Aftermarket turbocharger and supercharger kits will be allowed on a case-by-case basis.

B-Spec Remove wheelbase from spec lines and replace with Restrictor

#36074 from B-Spec/C-Spec Committee · Rule change · TB 24-11 (2024-11 Fastrack)

Summary

unclearB-Spec and C-Spec cars replace wheelbase spec with induction restrictor (mm) values, effective 2025-01-01.

As printed in Fastrack

In B-Spec Spec Lines that are not expiring on 1/1/25, replace Wheelbase as follows:
"(Effective 1/1/2025)Wheelbase Restrictor (mm)"
In B-Spec Spec Lines, update the value in the spec lines under the Restrictor column as follows effective 1/1/2025:
Chevrolet Sonic Sedan MT (12-19): "2525 33"
Chevrolet Sonic Sedan AT (12-19): "2525 35"
Chevrolet Sonic Hatchback MT (12-19): "2525 34"
Chevrolet Sonic Hatchback AT (12-19): "2525 36"
Fiat 500 (12-17): "2300"

Show 28 more lines

Ford Fiesta Hatchback (11-19): "2470 39"
Ford Fiesta Sedan (11-19): "2470 38"
Honda Fit MT (07-08): "2450"
Honda Fit AT (07-08): "2450"
Honda Fit MT (09-14): "2500"
Honda Fit AT (09-14): "2500"
Honda Fit MT (15-19): "2530 31"
Honda Fit CVT (15-19): "2530 33"
Hyundai Accent Hatchback (12-19): "2570 41"
Kia Rio Hatchback (12-19): "2570 41"
Mazda2 (10-14): "2490"
Mini Cooper Hatchback (R50) MT (02-06): "2466"
Mini Cooper Hatchback (R50) CVT (02-06): "2466"
Mini Cooper (R56) MT (07-10): "2466 44 (OE Catalyst) 40 (Header)"
Mini Cooper (R56) AT (07-10): "2466 46 (OE Catalyst 42 (Header)"
Mini Cooper Clubman (R55) (07-10): "2547 44 (OE Catalyst) 40 (Header)"
Mini Cooper (R56LCI) MT (11-13): "2466 43"
Mini Cooper (R56LCI) AT (11-13): "2466 43"
Mini Cooper Clubman (R55) (11-15): "2547 42"
Mini Cooper Coupe (R58) (12-15): "2466 42"
Nissan Micra Cup Cars (Canadian): "2450"
Nissan Versa Sedan (2012-2019): "2600"
Nissan Versa Hatchback (2012-2019): "2600"
Nissan Versa (2020-): "2618 38"
Toyota/Scion IA Sedan (16-20): "2570 38"
Toyota Yaris Hatchback (07-11): "2461 42"
Toyota Yaris Hatchback (12-18): "2510 42"
Toyota Yaris Sedan (07-12): "2550 41"

STU Audi 1.8t Wagon STU Table B

#36685 from Mike McLaughlin · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

fasterSTU Audi 1.8T wagon deleted; Porsche 944 1800 weight to Chart, turbo inlet restrictor removed.

As printed in Fastrack

In STU Spec Lines, Table B: Alternate Vehicle and Engine Requirements, delete Audi/VW 1.8 Turbo in its entirety.
In STU Spec Lines, Table B: Alternate Vehicle and Engine Requirements, Porsche 944 w/Max Displacement 1800, change as
follows:
Weight: "3050 Chart"
Notes: "VW/Audi 1.8L 35mm turbo engine permittedinlet restrictor required."

B-Spec Bilstein Rear Shock Request for Hyundai Accent/Kia Rio

#36965 from Alex Ratcliffe · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

suspension & brakesB-Spec Hyundai Accent and Kia Rio approve Bilstein B8 shock 33-187112 for rear suspension use.

As printed in Fastrack

In B-Spec Spec Lines, Hyundai Accent Hatchback (12-19), add to Notes the following:
"Bilstein B8 shock 33-187112 approved for use in rear suspension."
In B-Spec Spec Lines, Kia Rio Hatchback (12-19), add to Notes the following:
"Bilstein B8 shock 33-187112 approved for use in rear suspension."

STU Merger GT3 to STU

#37486 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

wordingSTU-GT3 reclassified as STU-GT3U effective January 1, 2026.

As printed in Fastrack

In STU, Table C, change STU-GT3 charge as follows:
"(Effective January 1, 2026) TABLE C: STU-GT3U"

STU GT3 TCR Tire allowance

#37494 from Club Racing Board · Rule change · TB 25-01 (2025-01 Fastrack)

Summary

slowerSTU GT3 TCR gains 275-width tire option with 100 lb weight penalty, but not in A compound.

As printed in Fastrack

In STU, Table C, GT3 TCR, add to Notes the following:
"May run DOT approved tire with maximum section width of 275 with 100 pound weight adder. May not run A compound with
275."

B-Spec Remove Redundant Language from Notes Sections

#37337 from B-Spec/C-Spec Committee · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

wordingB-Spec Honda Fit AT, Fit CVT, Mazda2, Mini Cooper R50 MT and CVT, Toyota Yaris remove redundant notes language.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit AT (07-08), change Notes as follows:
"Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR
52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring
and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress
# 62.1060. Any Cold Air Intake Package allowed (any manufacturer). This configuration is not currently eligible for Runoffs
competition. This car must compete in three (3) separate Super Tour weekends so that performance data can be collected. In
addition to SCCA data box, OBDII data collected via an AIM or similar device must be submitted. Any aftermarket header
allowed. Allow rear sway bar Progress # 62.1060. Any Cold Air Intake Package allowed (any manufacturer). This configuration is

Show 25 more lines

not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour weekends so that
performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar device must be
submitted."
In B-Spec Spec Lines, Honda Fit CVT (15-19), change Notes as follows:
"Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR
52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Exhaust pipe assy 18300F23SA81, ACG belt (6PK858)
31110FC4YA80. Allow rear sway bar Progress 62.1063. Allow Setrab 50- 119-7612 transmission cooler in addition to OEM."
In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows:
"Helper springs F&R 0000-04-9926, Spring spacer F&R 0000-04-9925, Rear sway bar 0000-04-2203-RR or 0000-04-
2312, Modified strut bearing plate 0000-04-2204, Crash bolt set 0000-04-2205, Allow rear torque bar Corksport #Mz2-3-070.
Cold air intake Corksport Mz2-6-117-31100 and air duct Mz2-6-120-10 are allowed. Exhaust Header (cat delete) HB.EM 60-404-
S-SS, HP-MZD001, or Mazda Motorsports PN 0000- 06-2410 permitted. Powerflex PFR19-1511BX2 rear suspension bushings
allowed. Allow Mazda part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C-56-110A, DO8C-56-
311, DO7A-56-321."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) MT (02-06), change Notes as follows:
"Allow KW: Coilover Kit: Variant 2: Gen 1 or KW equivalent, Vorshlag Mini R50/53 Camber Plates & Perches allowed. Ride height
measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear
sway bar Progress #62.0210."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) CVT (02-06), change Notes as follows:
"Allow KW: Coilover Kit: Variant 2: Gen 1 or KW equivalent, Vorshlag Mini R50/53 Camber Plates & Perches allowed. Ride height
measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. Allow rear
sway bar Progress #62.0210.CVT equipped cars allow Setrab 50-119-7612 transmission cooler in addition to OEM."
In B-Spec Spec Lines, Toyota Yaris Hatchback (07-11), change Notes as follows:
"PTR04-52061 TRD Sport shocks permitted. PTR11-52070 TRD spring kit permitted. Speed sensor may be disconnected. Cold air
intake K&N 69-8612TFK is allowed. Rear Swaybar PTR11-52071 is allowed. Any Camber plate is permitted."

Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper

Applies to Toyota Yaris on this page: Joseph Gersch

B-Spec Expire designated spec lines

#37517 from B-Spec/C-Spec Committee · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

removedB-Spec removes Mini Cooper Countryman R60, Cooper Paceman R61, and two Nissan Versa generations effective 2/1/25.

As printed in Fastrack

In B-Spec Spec Lines, delete the following spec lines effective 2/1/25 in their entirety:
"Mini Cooper Countryman (R60) (11-16)"
"Cooper Paceman (R61) (11-16)"
"Nissan Versa (07-11)"
"Nissan Versa (09-11)"

B-Spec Set expiration date for Nissan Micra Cup Cars (Canadian)

#37519 from B-Spec/C-Spec Committee · Rule change · TB 25-02 (2025-02 Fastrack)

Summary

wordingB-Spec Nissan Micra Cup Car spec line expires 7/1/25 unless appeal submitted by 6/30/25.

As printed in Fastrack

In B-Spec Spec Lines, Nissan Micra Cup Car, add to Notes the following:
"This spec line will expire on 7/1/25 unless an appeal is submitted by 6/30/25."

Cal Club 2025 → Cal Club 2026 2025-02-22 to 2026-02-21

STU BMW N54/N55 Engine Allowance Follow Up

#37447 from Martin Sarukhanyan · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

engineSTU BMW N54/N55 3.0L classified at Chart +3% minimum weight; N54 twin turbo not allowed.

As printed in Fastrack

In STU Spec Lines, Table A, classify BMW N54/N55 as follows:
STU Maximum Displacement
(cc's) Minimum Weight Notes
BMW N54/N55 3.0 Chart +3% (DI) Short blocks, heads, and intakes may be
freely swapped within these engine
designations. N54 twin turbo not allowed

B-Spec Toyota Yaris Hatchback (12-18) rear disc brakes

#37530 from B-Spec/C-Spec Committee · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

suspension & brakesB-Spec Toyota Yaris Hatchback 12-18 rear brakes now allow 10.2 inch disc alternative to 7.9 drum.

As printed in Fastrack

In B-Spec Spec Lines, Toyota Yaris Hatchback (12-18), please add to Brakes (inches) as follows:
"(F) 10.0 (R) 7.9 drum or 10.2 disc"

B-Spec Yaris Speed Sensor

#37536 from B-Spec/C-Spec Committee · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

wordingB-Spec Toyota Yaris Hatchback and Sedan may now disconnect speed sensor.

As printed in Fastrack

In B-Spec Spec Lines, Toyota Yaris Hatchback (12-18) AND Toyota Yaris Sedan (07-12), add to Notes the following:
"Speed sensor may be disconnected."

B-Spec Set Expiration Date For Fiat 500

#37689 from B-Spec/C-Spec Committee · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

wordingB-Spec Fiat 500 (12-17) spec line expires 1/1/26 unless appeal filed.

As printed in Fastrack

In B-Spec Spec Lines, Fiat 500 (12-17), please add to Notes the following language:
"This spec line will expire on 1/1/26 unless an appeal is filed."

STU STU Mini Cooper pulley size clarification re: letter #36980

#37717 from Aaron Fitzsimmons · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

fasterSTU Mini Cooper S SC supercharger pulley diameter reduced from 2.285 to 2.185.

As printed in Fastrack

In STU Spec Lines, Mini Cooper S SC, add to notes:
2100: "May run a 2.285 2.185 diameter pulley."

STU Question About a Weight Modifier

#37782 from Peter St Pierre · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

fasterSTU Honda K20C1 Turbo I4 exempted from 3% DI weight adder in Spec Lines Table A.

As printed in Fastrack

In STU Spec Lines, Table A, Honda K20C1 Turbo I4, add to Notes the following:
"The 3% DI weight adder does not need to be applied."

STU Increase Minimum Weight

#37919 from Club Racing Board · Rule change · TB 25-03 (2025-03 Fastrack)

Summary

slowerSTU GT3U minimum weight increases 150 to 250 pounds.

As printed in Fastrack

In STU Spec Lines, Table C: STU-GT3U, change Minimum Weight as follows:
"150 250 pounds"

B-Spec 2025 BOP Recommendations

#37520 from B-Spec/C-Spec Committee · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

fasterB-Spec Honda Fit MT intake now limited to three models with 25lb adder; Mazda2 exhaust headers allowed with up to 50lb adder; Mini Coopers FPR increased 1-2 points; Nissan Versa sedans 40lbs lighter, Yaris models 50lbs lighter.

As printed in Fastrack

In B-SPEC Spec Lines, change as follows:
Honda Fit MT (09-14): "Any Cold Air Intake Package allowed (any manufacturer) Allow Injen Intake SP1512, K&N Intake 69-
1017TTK, or HPS intake 827-102 with a 25lb adder."
Mazda2 (10-14): "Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001 allowed with a 50lb adder, or Mazda
Motorsports PN 0000- 06-2410 permitted with no weight adder."
Mini Cooper (R56) MT (07-10): "44 5 FPR (OE Catalyst)"
Mini Cooper (R56) AT (07-10): "46 7 FPR (OE Catalyst)"
Mini Cooper Clubman (R55) (07-10): "44 5 FPR (OE Catalyst)"

Show 7 more lines

Mini Cooper (R56LCI) MT (11-13): "43 4 FPR"
Mini Cooper (R56LCI) AT (11-13): "45 6 FPR (OE Catalyst)"
Mini Cooper Clubman (R55) (11-15): "42 4 FPR"
Nissan Versa Sedan (12-19): "2490 2450" "Allow Injen intake SP1906"
Nissan Versa Hatchback (12-19): "2490 2450" "Allow Injen intake SP1906"
Toyota Yaris Hatchback (12-18): "2400 2350"
Toyota Yaris Sedan (07-12): "2400 2350"

B-Spec Hyundai/Toyota Factory Rear Disc Models

#37534 from B-Spec/C-Spec Committee · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

wordingB-Spec Hyundai Accent and Toyota Yaris weight adjustments: ±25 lbs based on rear brake type.

As printed in Fastrack

In B-SPEC Spec Lines, add to Notes the following:
Hyundai Accent Hatchback (12-19): "Vehicles equipped with rear drum brakes subtract 25 lb."
Toyota Yaris Hatchback (12-18): "Vehicles equipped with rear disc brakes add 25 lb."

B-Spec Request to Update the Spec line for Hyundai Accent and Kia Rio

#37880 from Alex Ratcliffe · Rule change · TB 25-04 (2025-04 Fastrack)

Summary

wordingB-Spec Hyundai Accent and Kia Rio (12-19) allow Bilstein B14 kit #47167490 front shocks and BabyFace Fabrication sump extension #BF-HYU-PAN.

As printed in Fastrack

In B-SPEC Spec Lines, add to Notes as follows:
Hyundai Accent Hatchback (12-19): "Bilstein B14 kit #4716 → 7490 front shocks verified compatible. Allow BabyFace Fabrication
sump extension #BF-HYU-PAN."
Kia Rio Hatchback (12-19): "Bilstein B14 kit #4716 → 7490 front shocks verified compatible. Allow BabyFace Fabrication sump
extension #BF-HYU-PAN."

B-Spec Correct Hyundai/Kia Model Years

#37943 from B-Spec/C-Spec Committee · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

wordingB-Spec Hyundai Accent Hatchback and Kia Rio Hatchback model year ranges corrected.

As printed in Fastrack

In B-Spec Spec Lines, correct model years as follows:
"Hyundai Accent Hatchback (12-19 7)"
"Kia Rio Hatchback (12-19 5)"

B-Spec 07-08 Honda Fit MT Requests

#37974 from Caleb Patrie · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

slowerB-Spec 07-08 Honda Fit MT minimum weight increases 50 lbs, to 2450.

As printed in Fastrack

In B-SPEC Spec Lines, Honda Fit MT (07-08), change as follows:
Minimum weight: "2400 2450"
Notes: "OEM exhaust manifold required. Primary catalyst may be removed."

B-Spec Add B14 Kit Part # to Honda Fit (07-08) Spec line

#38010 from B-Spec/C-Spec Committee · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

wordingHonda Fit 07-08 MT and AT approved for Bilstein B14 kit 47172401 in B-Spec.

As printed in Fastrack

In B-SPEC Spec Lines, Honda Fit (07-08) MT, add to Notes the following:
"Bilstein B14 kit 4717 → 2401 verified compatible."
In B-SPEC Spec Lines, Honda Fit (07-08) AT, add to Notes the following:
"Bilstein B14 kit 4717 → 2401 verified compatible."

STU Wheel Size Inconsistency

#38018 from David Fiorelli · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

wordingSTU wheel width rules clarified: cars ≤2,850 lbs max 8 inches, cars >2,850 lbs max 9 inches.

As printed in Fastrack

In GCR, Section 9.1.4.1.F.1., change as follows:
"Wheels may not exceed 18 inches in diameter. or 8.0 inches in width for vehicles 2950 lbs. and under minimum allowed race
weight. Vehicles over 2850 minimum allowed race weight may use a 9 inch wide wheel. Cars equal to or less than 2,850 lbs.
minimum allowed race weight may not use wheels wider than 8 inches. Cars greater than 2,850 lbs. minimum allowed race
weight may not use wheels wider than 9 inches."

STU Table C: STU-GT3U Clarification

#38268 from Club Racing Board · Rule change · TB 25-05 (2025-05 Fastrack)

Summary

fasterSTU Spec Line GT3U minimum weight reduced from plus 250 to plus 225 pounds; wheel and tire options clarified with weight adjustments.

As printed in Fastrack

In STU Spec Line, Table C: STU-GT3U, change as follows:
Minimum Weight: “Current GT3 race weight plus 250 225 pounds”
Notes: "DOT approved tire with maximum section width of 245. GT3 cars base wheel is a maximum of 15”x9”. 18”x9” wheels
allowd with a 3% weight addition. GT3 cars utilizing 15”x7” wheels are limited to a maximum section width of 225 with a 25
pound weight reduction"
"All GT3U (Majors and Runoffs) cars using up to 15"x7" wheels limited to 225 section width tires shall run at current GT3 race
weight plus 225lbs. All Gt3U cars shall run a DOT approved tire with a maximum section width of 245. GT3U cars are allowed
optional 15"x9" wheels with a 1.5% weight addition or up to 18"x9" wheels with a 3.0% weight addition to the total weight

Show 1 more lines

including the 225 lbs."

B-Spec Add Sedan spec lines for Hyundai & Kia

#37537 from B-Spec/C-Spec Committee · Rule change · TB 25-06 (2025-06 Fastrack)

Summary

cars addedB-Spec adds Hyundai Accent Sedan (12-17) and Kia Rio Sedan (12-17), both 1591cc, 2525 lbs, 40mm FPR restrictor.

As printed in Fastrack

In B-SPEC Spec Lines, classify Hyundai Accent Sedan (12-17) as follows:
B-SPEC Bore x
Stroke(mm)
Displacement
(cc)
Gear Ratios Final

A specification table follows in the original; it is not shown here.

B-Spec Shifter Bushing Questions.

#38048 from Eric Yagel · Rule change · TB 25-06 (2025-06 Fastrack)

Summary

wordingB-Spec Honda Fit MT 09-14 allows Acuity Shifter Base Bushing Kit 1954.

As printed in Fastrack

In B-SPEC Spec Lines, Honda Fit MT (09-14) add to Notes the following:
"Allow Acuity Shifter Base Bushing Kit 1954."

B-Spec Add Weapon R Intake to Honda Fit MT (09-14) Spec Line

#38306 from B-Spec/C-Spec Committee · Rule change · TB 25-06 (2025-06 Fastrack)

Summary

wordingB-Spec Honda Fit AT 09-14 adds Weapon R Intake 301-166-301 to approved parts.

As printed in Fastrack

In B-SPEC Spec Lines, Honda Fit AT (09-14), add to Notes the following:
"Weapon R Intake 301-166-301"

B-Spec Update Rule 46

#38307 from B-Spec/C-Spec Committee · Rule change · TB 25-06 (2025-06 Fastrack)

Summary

wordingB-Spec and C-Spec shift linkage/cables no longer prohibited from any modification; approved aftermarket bushings now permitted.

As printed in Fastrack

In GCR, Section 9.1.10.E.46. change as follows:
"Aftermarket shift knobs are allowed and shift levers mat y be bent or extended, however the shift linkage/cables must remain
stock and may not be modified in any way. Approved aftermarket shift linkage bushings are permitted."

STU 2.8-3.2L N/A Engine Allowances

#38007 from Ben Slechta · Rule change · TB 25-07 (2025-07 Fastrack)

Summary

unclearSTU 2.8-3.2L N/A engines now allow 245 max tire width; over 3150 lbs may run 275 with 2% weight penalty.

As printed in Fastrack

In GCR, Section 9.1.4.G.1, add the following:
"A maximum section width of 245 is permitted. Cars over 3150 lbs. may run a 275 tire with a 2% weight adder."

STU 2006-2015 Mazda Miata Intake Manifold

#38422 from German Candelario Candelario · Rule change · TB 25-07 (2025-07 Fastrack)

Summary

wordingSTU Mazda MZR may use Goodwin 61-2510 or Gato Performance 31972 intake manifold.

As printed in Fastrack

In STU, Table A, Mazda MZR (LF, L3, L5), change Notes as follows:
"May use Goodwin Part # 61-2510 or Gato Performance Part #31972 Intake manifold . "

STU Requesting Approval of the JDM Honda h23a

#38489 from Eric Fiest · Rule change · TB 25-07 (2025-07 Fastrack)

Summary

cars addedSTU Honda JDM H23a added, 2259cc displacement, minimum weight per Chart, must meet ST engine regulations.

As printed in Fastrack

In STU, Table B, classify Honda JDM H23a as follows:
STU Maximum Displacement (cc's) Minimum Weight Notes
Honda JDM H23a 2259 Chart Must meet all ST engine regulations.

B-Spec Disabling 2 Pedal Shutdown

#38354 from Eric Yagel · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

wordingB-Spec Honda Fit MT 09-14 two pedal shutdown may be disabled by cutting/de-pinning pin 42 BKSW at main ECU connector.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit MT (09-14), add to Notes the following:
"Two pedal shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay."

B-Spec Update Honda Fit MT (07-08) Intake Allowance

#38530 from B-Spec/C-Spec Committee · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

slowerB-Spec Honda Fit MT 07-08 intake restricted to Injen SP1511 only, from any Cold Air Intake Package.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit MT (07-08), change Notes as follows:
"Bilstein B14 kit 47172401 verified compatible. Allow rear sway bar Progress #62.1060. Any Cold Air Intake Package allowed (any
manufacturer). Allow Injen Intake SP1511. This configuration is not currently eligible for Runoffs competition. This car must
compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data box,
OBDII data collected via an AIM or similar device must be submitted. OEM exhaust manifold required. Primary catalyst may be
removed."

STU STU-TCR Adjustments

#38723 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

slowerSTU-TCR tire width increases to 275 with weight adder raised from 100 to 150 pounds.

As printed in Fastrack

In STU Spec Lines, Table C: STU-GT3U, GT3-TCR, change as follows: Remove the current TCR spec line and add the TCR spec lines
from GT3 that are being removed, adding the below to the notes.
"DOT approved tire with maximum section width of 245. May run DOT approved tire with maximum section width of 275 with
100 150 pound weight adder. May not run A-compound with 275. STU-TCR spitters and side valance must comply with
9.1.4.D.3.f. STU-TCR chassis ride height must comply with 9.1.4.1.A.1."

STU Lotus Weight Reduction

#38772 from Club Racing Board · Rule change · TB 25-08 (2025-08 Fastrack)

Summary

fasterSTL/STU Lotus weight reduced: Evora GT4 to 2700 lbs, Elise Cup R to 2250 lbs, Elise/Exige SC to 2450-2550 lbs.

As printed in Fastrack

In 9.1.2. GT2/ST Spec Lines, Lotus Evora GT4, change Weight as follows:
"2750 2700"
In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows:
Lotus Elise Cup R: "2300 2250"
Lotus Elise SC/ Lotus Exige SC: "2300 2550
2500 2450"

B-Spec Remove Asterisk from Rule 9

#38768 from B-Spec/C-Spec Committee · Rule change · TB 25-09 (2025-09 Fastrack)

Summary

wordingB-Spec and C-Spec: asterisk removed from public road usage note in rule 9.1.10.D.9.

As printed in Fastrack

In GCR, Section 9.1.10.D.9, change as follows:
"* If car is used on public roads, these items should be replaced, reactivated, rearmed, etc. when not in competition."

STU Lotus Weight Reduction E&O

#38919 from Club Racing Board · Rule change · TB 25-09 (2025-09 Fastrack)

Summary

fasterSTU Lotus Elise SC and Exige SC weight reduced from 2450 to 2250 lbs.

As printed in Fastrack

In STU Table B: Alternate Vehicle and Engine Allowances, change Weight as follows:
Lotus Elise SC/ Lotus Exige SC: "2450 2250"

B-Spec Alternate Shift Cable Bushings and Rear Spring Seats

#38472 from Caleb Patrie · Rule change · TB 25-09 (2025-09 Fastrack)

Summary

wordingB-Spec Honda Fit MT 07-08 allows Torque Solution Shifter Cable Bushing kit TS-SCB-506.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit MT (07-08), add to Notes the following:
"(Effective 11/1/2025) Allow Torque Solution Shifter Cable Bushing kit TS-SCB-506."

STU Non-Homologated Engine Swaps - Specifically K24A2 w/ Honda CRZ

#38746 from William Rori · Rule change · TB 25-09 (2025-09 Fastrack)

Summary

slowerSTU Honda K24 engine swap weight increases by 2% effective November 1, 2025.

As printed in Fastrack

In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, Honda K24, change Weight as follows:
"(Effective 11/1/2025) Chart + 2%"

B-Spec Fiesta BOP Adjustment

#38847 from B-Spec/C-Spec Committee · Rule change · TB 25-09 (2025-09 Fastrack)

Summary

slowerB-Spec Ford Fiesta Hatchback and Sedan gain 55 lbs to 2525; restrictors increase 1 mm.

As printed in Fastrack

In B-Spec Spec Lines, Ford Fiesta Hatchback (11-19), change as follows:
Weight (lbs): "(Effective 11/1/2025) 2470 2525"
Restrictor (mm) & Type: "(Effective 11/1/2025)39 FPR 40 FPR"
In B-Spec Spec Lines, Ford Fiesta Sedan (11-19), change as follows:
Weight (lbs): "(Effective 11/1/2025) 2470 2525"
Restrictor (mm) & Type: "(Effective 11/1/2025)38 FPR 39 FPR"

B-Spec Request to Remove Rear Shock From Spec Line Hyundai Accents/Kia

#39017 from Alex Ratcliffe · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

unclearB-Spec Hyundai Accent and Kia Rio remove Bilstein B8 shock 33-187112 rear suspension approval.

As printed in Fastrack

In B-Spec Spec Lines, Hyundai Accent Sedan (12-17), change Notes as follows:
"Bilstein B8 shock 33- 187112 approved for use in rear suspension."
In B-Spec Spec Lines, Kia Rio Sedan (12-17), change Notes as follows:
"Bilstein B8 shock 33- 187112 approved for use in rear suspension."

B-Spec Update Honda Fit MT (07-08) Runoffs Eligibility

#39060 from B-Spec/C-Spec Committee · Rule change · TB 25-11 (2025-11 Fastrack)

Summary

fasterB-Spec Honda Fit MT (07-08) becomes Runoffs-eligible; previous three-weekend Super Tour requirement removed.

As printed in Fastrack

In B-Spec Spec Lines, Honda Fit MT (07-08), change Notes as follows:
"Bilstein B14 kit 47172401 verified compatible. Allow rear sway bar Progress #62.1060. Allow Injen Intake SP1511 OEM exhaust
manifold required. Primary catalyst may be removed. This configuration is not currently eligible for Runoffs competition. This car
must compete in three (3) separate Super Tour weekends so that performance data can be collected. In addition to SCCA data
box, OBDII data collected via an AIM or similar device must be submitted. (Effective 11/1/2025) Allow Torque Solution Shifter
Cable Bushing kit TS-SCB-506."

STU Turbo Inlet Restrictor Table

#38961 from John Weisberg · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

slowerSTU 36mm restrictor allows 2830 lbs (up 10 lbs from 2820); 37mm allows 2980 lbs (down 5 lbs from 2985).

As printed in Fastrack

In GCR, Section 9.1.4.H.3, change chart as follows:

A specification table follows in the original; it is not shown here.

STU 275 Tire Rule

#38983 from Peter Federlin · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

slowerSTU cars over 3150 lbs lose 275-tire option with 2% weight adder.

As printed in Fastrack

In GCR, Section 9.1.4.G.1., change as follows:
"A maximum section width of 245 is permitted. Cars over 3150 lbs. may run a 275 tire with a 2% weight adder."

STU STU Honda Engine weight penalty

#39375 from Super Touring Committee · Rule change · TB 25-12 (2025-12 Fastrack)

Summary

fasterSTU Honda K20 and K24 engines lose 2% minimum weight penalty.

As printed in Fastrack

In STU Spec Lines, Table B: Alternate Vehicle and Engine Allowances, change Minimum Weight as follows:
Honda K20: "Chart + 2%"
Honda K24: "Chart + 2%"

B-Spec Notes section cleanup

#39062 from B-Spec/C-Spec Committee · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

wordingB-Spec Chevrolet Sonic and Ford Fiesta, Honda Fit notes reorganized from individual allowances to approved parts lists; wording cleanup.

As printed in Fastrack

In B-Spec Spec Lines, Chevrolet Sonic Sedan MT (12-19), change Notes as follows:
"GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance
#ZZ-SNCRSB. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface Fabrication brake caliper piston SNC-SS. Approved parts: ZZ
Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-ZZ013, Babyface Fabrication brake caliper piston SNC-SS.
Bilstein B14 kit 47-171725 verified compatible."
In B-Spec Spec Lines, Chevrolet Sonic Sedan AT (12-19), change Notes as follows:
"GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance
#ZZ-SNCRSB. For automatic allow Setrab 1-series Part No. FP119M221. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface

Show 185 more lines

Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-
ZZ013, Babyface Fabrication brake caliper piston SNC-SS, Setrab transmission cooler 50-119-7612. Bilstein B14 kit 47-171725
verified compatible. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate
Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an
AIM or similar device must be submitted."
In B-Spec Spec Lines, Chevrolet Sonic Hatchback MT (12-19), change Notes as follows:
"GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance
#ZZ-SNCRSB. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface Fabrication brake caliper piston SNC-SS. Approved parts: ZZ
Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-ZZ013, Babyface Fabrication brake caliper piston SNC-
SS. World Challenge suspension kit permitted but no longer available. Bilstein B14 kit 47-171725 verified compatible."
In B-Spec Spec Lines, Chevrolet Sonic Hatchback AT (12-19), change Notes as follows:
"GM suspension kit #23123679 permitted. Bilstein B14 kit #47-171725 verifed compatible. Allow rear sway bar ZZ Performance
#ZZ-SNCRSB. For automatic allow Setrab 1-series Part No. FP119M221. Allow Aluminum Radiator #ZZP-ZZ013. Allow Babyface
Fabrication brake caliper piston SNC-SS. Approved parts: ZZ Performance rear sway bar ZZ-SNCRSB, ZZ Performance radiator ZZP-
ZZ013, Babyface Fabrication brake caliper piston SNC-SS, Setrab transmission cooler 50-119-7612. Bilstein B14 kit #47-171725
verified compatible. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate
Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an
AIM or similar device must be submitted."
In B-Spec Lines, Ford Fiesta Hatchback (11-19), change Notes as follows:
"Suspension kit #M-FR3-FAEB allowed. Rear axle bushing #000-04-2203-RR allowed. Allow rear torque bar Corksport #Mz2-3-
070. Cold air intake K&N 69-3530TS is allowed. Powerflex PFR19-1511BX2 rear suspension bushing allowed. Eibach rear sway bar
#35143.312 o r35143.320 is allowed. Mazda front hub D651-33-06 and rear hub D651-26-15XE allowed. Approved parts: Eibach
rear sway bar 35143.312, Corksport rear torque bar MZ2-3-070, K&N intake 69-3530TS, Powerflex rear suspension bushing
PFR19-1511BX2, Mazda front hub D651-33-06, Mazda rear hub D651-26-15XE."
In B-Spec Spec Lines, Ford Fiesta Sedan (11-19), change Notes as follows:
"Suspension kit #M-FR3-FAEB allowed. Rear axle bushing #000-04-2203-RR allowed. Allow rear torque bar Corksport #Mz2-3-
070. Cold air intake K&N 69-3530TS is allowed. Powerflex PFR19-1511BX2 rear suspension bushing allowed. Eibach rear sway bar
#35143.312 o r35143.320 is allowed. Mazda front hub D651-33-06 and rear hub D651-26-15XE allowed. Approved parts: Eibach
rear sway bar 35143.312, Corksport rear torque bar MZ2-3-070, K&N intake 69-3530TS, Powerflex rear suspension bushing
PFR19-1511BX2, Mazda front hub D651-33-06, Mazda rear hub D651-26-15XE."
In B-Spec Spec Lines, Honda Fit MT (07-08), change Notes as follows:
"Bilstein B14 kit 47172401 verified compatible. Allow rear sway bar Progress #62.1060. Allow Injen Intake SP1511 OEM exhaust
manifold required. Primary catalyst may be removed. Allow Torque Solution Shifter Cable Bushing kit TS-SCB-506. Approved
parts: Progress rear sway bar 62.1060, Injen intake SP1511, Torque Solution shifter cable bushings TS-SCB-506. Bilstein B14 kit
47172401 verified compatible. OEM exhaust manifold required. Primary catalyst may be removed."
In B-Spec Spec Lines, Honda Fit AT (07-08), change Notes as follows:
"Bilstein B14 kit 47172401 verified compatible. Any aftermarket header allowed. Allow rear sway bar Progress # 62.1060. Any
Cold Air Intake Package allowed (any manufacturer). Approved parts: Progress rear sway bar 62.1060, Injen intake SP1511,
Setrab transmission cooler 50-119-7612, any aftermarket header. Bilstein B14 kit 47172401 verified compatible."
In B-Spec Spec Lines, Honda Fit MT (09-14), change Notes as follows:
"Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR
52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring
and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress
# 62.1061 Allow Injen Intake SP1512, K&N Intake 69-1017TTK, or HPS intake 827-102 with a 25lb adder. Allow Acuity Shifter
Base Bushing Kit 1954 Two pedal shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in
the engine bay. Approved parts: Progress rear sway bar #62.1061, Injen Intake SP1512, K&N Intake 69-1017TTK, or Weapon R
Intake 301-166-301, Acuity shifter bushing kit 1954. World Challenge suspension kit permitted but no longer available. Two pedal
shutdown may be disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay."
In B-Spec Spec Lines, Honda Fit AT (09-14), change Notes as follows:
"Allow damper and spring set 51600F23SA100, Damper FR LH 51605F23SA100, Damper FR RH 51606F23SA100, Damper RR
52610F23SA100, Spring adjust asy RR 52691F23SA010. Seat upper FR spring 51688F23SA200, 51402FC4YA00 front helper spring
and 51403FC4YA00 front spacer permitted. Front Damper Mount P/N 51920-F23S-A30 is allowed. Allow rear sway bar Progress
# 62.1061. Allow Setrab 50-119-7612 transmission cooler in addition to OEM. Any aftermarket exhaust/header allowed. Any
Cold Air Intake Package allowed (any manufacturer). Weapon R Intake 301-166-301. Approved parts: Progress rear sway bar
62.1061, Injen Intake SP1512, any aftermarket header, Setrab transmission cooler 50-119-7612. Two pedal shutdown may be
disabled by cutting/de-pinning pin 42 (BKSW) at the main ECU connector in the engine bay."
In B-Spec Spec Lines, Honda Fit MT (15-19), change Notes as follows:
"Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR
52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Allow rear sway bar Progress 62.1063. Approved parts: Progress
rear sway bar 62.1063."
In B-Spec Spec Lines, Honda Fit CVT (15-19), change Notes as follows:
"Allow damper FR LH 51605F23SA81, Damper FR RH FR RH 51606F23SA81, Damper RR 52610F23SA80, Spring adjust assy RR
52691F23SA80, Camber Adjuster Comp, Damper 51920F23SA82. Allow rear sway bar Progress 62.1063. Allow Setrab 50-119-
7612 transmission cooler in addition to OEM. Approved parts: Progress rear sway bar 62.1063, Setrab transmission cooler 50-
119-7612. This configuration is not currently eligible for Runoffs competition. This car must compete in three separate
Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected via an
AIM or similar device must be submitted."
In B-Spec Spec Lines, Hyundai Accent Hatchback (12-17), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-ASTRear; KSJ03-20-003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33- 187112 approved for
use in rear suspension. Bilstein B14 kit #47167490 front shocks verified compatible. Allow BabyFace Fabrication sump extension
#BF-HYU-PAN Vehicles equipped with rear drum brakes subtract 25 lb. Approved parts: Evilla Motorsports rear torque bar KR-B1,
BabyFace Fabrication sump extension BF-HYU-PAN. Vehicles equipped with rear drum brakes subtract 25 lbs."
In B-Spec Spec Lines, Hyundai Accent Sedan (12-17), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33-187112 approved for
use in rear suspension. Approved parts: Evilla Motorsports rear torque bar KR-B1, BabyFace Fabrication sump extension BF-HYU-
PAN. Vehicles equipped with rear drum brakes subtract 25 lbs."
In B-Spec Spec Lines, Kia Rio Hatchback (12-15), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B14 kit #47167490 front shocks
verified compatible. Allow BabyFace Fabrication sump extension #BF-HYU-PAN Bilstein B8 shock 33-187112 approved for use in
rear suspension. Approved parts: Evilla Motorsports rear torque bar KR-B1, BabyFace Fabrication sump extension BF-HYU-PAN.
World Challenge suspension kit permitted but no longer available."
In B-Spec Spec Lines, Kia Rio Sedan (12-17), change Notes as follows:
"Allow AKSJ03-10-001 Damper Frt Assembly; AKSJ03-20-001 Damper-AST-Rear; KSJ03-20- 003 Rear Upper Spring Perch Delrin;
AKSJ03-60-001 Sump Pan Extension. Allow rear torque bar Evilla Motorsports #KR-B1. Bilstein B8 shock 33-187112 approved for
use in rear suspension. Approved parts: Evilla Motorsports rear torque bar #KR-B1, BabyFace Fabrication sump extension BF-HYU-
PAN."
In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows:
"Rear sway bar 0000-04-2203-RR or 0000-04-2312, Allow rear torque bar Corksport #Mz2- 3-070. Cold air intake Corksport Mz2-
6-117-31100 and air duct Mz2-6-120-10 are allowed. Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001, allowed with
a 50lb adder or Mazda Motorsports PN 0000-06-2410 with no weight adder permitted. Powerflex PFR19- 1511BX2 rear
suspension bushings allowed. Allow Mazda part number 0000-01-2501-CR Radiator. Allow Mazda undertray part number DO8C-
56-110A, DO8C-56-311, DO7A-56-321. Approved parts: Mazda Motorsports rear sway bar 0000-04-2203-RR, Eibach/Mazda
Motorsports rear sway bar 35143.312/0000-04-2312, Corksport rear torque bar #MZ2- 3-070, Corksport intake MZ2-6-117-
31100, Corksport air duct MZ2-6-120-10, Powerflex PFR19-1511BX2 rear suspension bushings, Mazda Motorsports radiator
0000-01-2501-CR, Mazda Motorsports header 0000-06-2410, Mazda undertray/side shields DO8C-56-110A, DO8C-56-311, DO7A-
56-321."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) MT (02-06), change Notes as follows:
"Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Allow rear sway bar Progress #62.0210. Approved parts: Progress rear sway bar 62.0210, Mevotech leteral link CMK100003. Ride
height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches."
In B-Spec Spec Lines, Mini Cooper Hatchback (R50) CVT (02-06), change Notes as follows:
"Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Allow rear sway bar Progress #62.0210.CVT equipped cars allow Setrab 50-119-7612 transmission cooler in addition to
OEM. Approved parts: Progress rear sway bar 62.0210, Mevotech leteral link CMK100003, Setrab transmission cooler 50-119-
7612. Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5
inches."
In B-Spec Spec Lines, Mini Cooper (R56) MT (07-10), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10-
2101-2S permitted. Approved parts: Progress rear sway bar 62.0210, OBX header 10-2101-2S. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
In B-Spec Spec Lines, Mini Cooper (R56) AT (07-10), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1
125.Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5
inches. Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header
part #10-2101-2S permitted. Automatic equipped cars only allow Setrab 50-119-7612 transmission cooler in addition to
OEM. Approved parts: Progress rear sway bar 62.0210, Setrab transmission cooler 50-119-7612. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. This configuration is not currently
eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be
collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Mini Cooper Clubman (R55) (07-10), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10-
2101-2S permitted. Approved parts: Progress rear sway bar 62.0210, OBX header 10-2101-2S. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
In B-Spec Spec Lines, Mini Cooper (R56LCI) MT (11-13), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts:
Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding
shall be no less than 5 inches."
In B-Spec Spec Lines, Mini Cooper (R56LCI) AT (11-13), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. OBX header part #10-
2101-2S permitted with 41mm FPR. Automatic equipped cars only allow Setrab 50- 119-7612 transmission cooler in addition to
OEM. Approved parts: Progress rear sway bar 62.0210, Setrab transmission cooler 50-119-7612. Ride height measured from the
metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches. This configuration is not currently
eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance data can be
collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Mini Cooper Clubman (R55) (11-15), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts:
Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding
shall be no less than 5 inches."
In B-Spec Spec Lines, Mini Cooper Coupe (R58) (12-15), change Notes as follows:
"Allow L/F Strut-spring assembly 31 31 1 126, R/F Strut-spring assembly 31 31 1 125, Rear Shock-spring assembly 33 50 1 125.
Ride height measured from the metal underneath the bottom of the plastic door rocker molding shall be no less than 5 inches.
Adjustable front camber plate part number 31 30 1 507 is allowed. Allow rear sway bar Progress #62.0210. Approved parts:
Progress rear sway bar 62.0210. Ride height measured from the metal underneath the bottom of the plastic door rocker molding
shall be no less than 5 inches."
In B-Spec Spec Lines, Nissan Versa Sedan (2012-2019), change Notes as follows:
"Hardrace HR-Q0146 19mm rear sway bar permitted. Allow Injen intake SP1906. Approved parts: Hardrace rear sway bar HR-
Q0146, Injen intake SP1906."
In B-Spec Spec Lines, Nissan Versa Hatchback (2012-2019), change Notes as follows:
"Hardrace HR-Q0146 19mm rear sway bar permitted. Allow Injen intake SP1906. Approved parts: Hardrace rear sway bar HR-
Q0146, Injen intake SP1906."
In B-Spec Spec Lines, Nissan Versa (2020-), change Notes as follows:
"This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour
weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar
device must be submitted. This configuration is not currently eligible for Runoffs competition. This car must compete in three
separate Majors/Super Tour events so performance data can be collected. In addition to an SCCA data box, OBDII data collected
via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Toyota/Scion IA Sedan (16-20), change Notes as follows:
"This configuration is not currently eligible for Runoffs competition. This car must compete in three (3) separate Super Tour
weekends so that performance data can be collected. In addition to SCCA data box, OBDII data collected via an AIM or similar
device must be submitted. Allow ST Suspension Kit 1327502. Approved parts: ST suspension kit 1327502. This configuration is not
currently eligible for Runoffs competition. This car must compete in three separate Majors/Super Tour events so performance
data can be collected. In addition to an SCCA data box, OBDII data collected via an AIM or similar device must be submitted."
In B-Spec Spec Lines, Toyota Yaris Hatchback (07-11), change Notes as follows:
"Speed sensor may be disconnected. Cold air intake K&N 69-8612TFK is allowed. Rear Swaybar PTR11-52071 is allowed.
Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed sensor may be disconnected."
In B-Spec Spec Lines, Toyota Yaris Hatchback (12-18), change Notes as follows:
"Rear Swaybar PTR11-52071 is allowed. Cold air intake K&N 69-8612TFK is allowed. Speed sensor may be disconnected. Vehicles
equipped with rear disc brakes add 25 lb. Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed
sensor may be disconnected. Vehicles equipped with rear disc brakes add 25 lbs."
In B-Spec Spec Lines, Toyota Yaris Sedan (07-12), change Notes as follows:
"Rear Swaybar PTR11-52071 is allowed. Cold air intake K&N 69-8612TFK is allowed. Speed sensor may be disconnected.
Approved parts: TRD rear sway bar PTR11-52071, K&N intake 69-8612TFK. Speed sensor may be disconnected."

Applies to Mini Cooper on this page: Trenton Kramer, Thomas Lepper

Applies to Toyota Yaris on this page: Joseph Gersch

B-Spec 2026 BOP Recommendations

#39475 from B-Spec/C-Spec Committee · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

unclearB-Spec: Sonic restrictors removed, Fit MT +25 lbs to 2550, Fit CVT restrictor removed, Mini Coopers restrictors increased 2-4 mm, Versa sedans -25 lbs to 2425, Versa/IA restrictors removed.

As printed in Fastrack

In B-Spec Spec Lines, change as follows:
Chevrolet Sonic Sedan AT (12-19):
Restrictor (mm) & Type: "35 FPR"
Chevrolet Sonic Hatchback AT (12-19):
Restrictor (mm) & Type: "35 FPR"
Honda Fit MT (09-14):
Weight (lbs): "2525 2550"
Honda Fit CVT (15-19):

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Restrictor (mm) & Type: "33 FPR"
Mini Cooper Hatchback (R50) MT (02-06):
Weight (lbs): "2545 2525"
Mini Cooper (R56) MT (07-10):
Restrictor (mm) & Type: "FPR 45 47 OE Catalyst"
Mini Cooper (R56) AT (07-10):
Restrictor (mm) & Type: "47 FPR (OE Catalyst) 42 FPR (Header)"
Mini Cooper Clubman (R55) (07-10):
Restrictor (mm) & Type: "FPR 45 47 OE Catalyst"
Mini Cooper (R56LCI) MT (11-13):
Restrictor (mm) & Type: "FPR 44 46"
Mini Cooper (R56LCI) AT (11-13):
Restrictor (mm) & Type: "46 FPR (OE Catalyst) 41 FPR (Header)"
Mini Cooper Clubman (R55) (11-15):
Restrictor (mm) & Type: "FPR 44 46"
Nissan Versa Sedan (2012-2019):
Min weight: "2450 2425"
Nissan Versa Hatchback (2012-2019):
Min weight: "2450 2425"
Nissan Versa (2020-):
Restrictor (mm) & Type: "38 FPR"
Toyota/Scion IA Sedan (16-20):
Restrictor (mm) & Type: "38 FPR"

STU Request for Permission on Aftermarket Turbo Kit and Intake

#39529 from John Grim · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

fasterSTU Mazda MZR (LF, L3, L5) Turbo classified; Jack Spania Racing 70 mm intake manifold and Fab9 Tuning bottom-mount turbo kit approved.

As printed in Fastrack

In STU Spec Lines, Table A: Alternate Vehicle and Engine Allowances, Mazda MZR (LF, L3, L5), change Notes as follows:
"Short blocks, heads, and intakes may be freely swapped within these engine designations. May use Goodwin Part # 61-
2510 or, Gato Performance Part #31972 or Jack Spania Racing 70 mm sheet-metal aluminum Intake manifold. Must use stock
throttle body or Acura part number 16400-PND-A17."
In STU Spec Lines, Table A: Alternate Vehicle and Engine Allowances, classify Mazda MZR (LF, L3, L5) Turbo as follows:
STU Maximum Displacement (cc's) Minimum Weight Notes
Mazda MZR (LF, L3,
L5) Turbo

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Varies Chart Short blocks, heads, and intakes may be freely
swapped within these engine designations. May
use Jack Spania Racing 70 mm sheet-metal
aluminum Intake manifold. Must use stock
throttle body or Acura part number 16400-PND-
A17. Fab9 Tuning bottom-mount turbo kit
approved with one of the STU approved Turbos.

B-Spec Expire NLA Mazda 2 Headers

#39582 from B-Spec/C-Spec Committee · Rule change · TB 26-01 (2026-01 Fastrack)

Summary

slowerB-Spec Mazda2 10-14 cat-delete header swap removes 50 lb weight adder option, now Mazda Motorsports PN only.

As printed in Fastrack

In B-Spec Spec Lines, Mazda2 (10-14), change Notes as follows:
"Exhaust Header (cat delete) HB.EM 60-404-S-SS, HP-MZD001, allowed with a 50lb adder or Mazda Motorsports PN 0000-06-
2410 with no weight adder permitted.”

B-Spec C-Spec Rear Sway Bars

#39652 from B-Spec/C-Spec Committee · Rule change · TB 26-02 (2026-02 Fastrack)

Summary

wordingC-Spec rear sway bars approved for Chevrolet Cruze, Dodge Dart, Ford Focus, Honda Civic, Mazda3i, Toyota Corolla with specified part numbers.

As printed in Fastrack

In C-Spec Spec Lines, change Notes as follows:
Chevrolet Cruze (2010-16):
"Allow BC Racing Q-06-BR suspension kit or RedShift Q-06-CSPEC. Allow Babyface Fabrication brake caliper piston SNC-
SS. Approved parts: BC Racing Q-06-BR or RedShift Q-06-CSPEC suspension kit, Babyface Fabrication brake caliper piston SNC-
SS, ZZ Performance ZZ-SNCRSB or Whiteline BHR93 rear sway bar.
Dodge Dart (2014-16):
"Allow BC Racing or RedShift Z-06-CSPEC kit. Approved parts: BC Racing Z-06-BR or RedShift Z-06-CSPEC kit, Progress rear sway
bar 62.0606."

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Ford Focus Hatchback/Sedan (2011-18):
"Allow BC Racing E-21-BR or RedShift E-21-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved
parts: BC Racing E-21-BR or RedShift E-21-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber
arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar."
Honda Civic Coupe/Sedan (2012-15):
"Allow BC Racing A-58-BR or RedShift A-18-CSPEC kit. Approved parts: BC Racing A-58-BR or RedShift A-18-CSPEC suspension kit,
Progress 62.1026 or Megan Racing MRS-HA-0791 rear sway bar."
Honda Civic Coupe/Sedan (2006-11):
"Allow BC Racing A-18-BR or RedShift A-58-CSPEC kit. Approved parts: BC Racing A-58-BR or RedShift A-18-CSPEC suspension kit,
Progress 62.1026 or Megan Racing MRS-HA-0791 rear sway bar."
Mazda3i SKYACTIV (2012-13):
"Allow BC Racing N-03-BR or RedShift N-03-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved
parts: BC Racing N-03-BR or RedShift N-03-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber
arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar."
Mazda 3i MZR (2010-13):
"Allow BC Racing N-03-BR or RedShift N-03-CSPEC kit. Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved
parts: BC Racing N-03-BR or RedShift N-03-CSPEC suspension kit, Corksport Axl-3-318-Black adjustable rear camber
arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline BMR78XZ rear sway bar."
Mazda 3i (2004-09):
"Allow Corksport Axl-3-318-Black adjustable rear camber arms. Approved parts: BC Racing N-03-BR or RedShift N-03-CSPEC
suspension kit, Corksport Axl-3-318-Black adjustable rear camber arms, Corksport Axl-3-071-12, Eibach 35134.312, or Whiteline
BMR78XZ rear sway bar."
Toyota Corolla (2007-12):
"Allow BC Racing C-02-BR or RedShift C-02-CSPEC kit. Approved parts: BC Racing C-02-BR or RedShift C-02-CSPEC suspension kit,
TRD PTR11-12080 or Megan Racing MRS-TY-1710 rear sway bar."
Toyota Corolla (2013-18):
"Allow BC Racing C-02-BR or RedShift C-02-CSPEC kit. Approved parts: BC Racing C-02-BR or RedShift C-02-CSPEC suspension
kit, TRD PTR11-12080 or Megan Racing MRS-TY-1710 rear sway bar."

What the rules allowed changed as listed; this does not say what any particular car ran.